Quick view Details NR RACING | sku: NR_DLRET-390-ALUM Aluminum Retainer for 6.5 mm Valves MSRP: Now: $6.99 Add to Cart Compare Quick view Details NR RACING | sku: NR_VAL32-65-3465 Stainless Valve 31.5 mm x 6.5 mm MSRP: Now: $31.99 View Details Compare Quick view Details NR RACING | sku: NR_VAL35-65-3465 Stainless Valve 35 mm x 6.5 mm MSRP: Now: $31.99 View Details Compare SPECIAL ORDER Quick view Details NONE | sku: ARC_DJ-3282 DJ-3282 Wrist Pin Honda GX340/390 MSRP: Now: $10.50 Add to Cart Compare Quick view Details NONE | sku: ARC_DJ-3330S DJ-3330S GX390 Metal Exhaust Gasket MSRP: Now: $2.12 View Details Compare Quick view Details NONE | sku: ARC_6623-E ARC 6623-E Electric/Pull Start Billet Flywheel GX390 Predator 420 13-16HP Clone Engines MSRP: Now: $229.95 Add to Cart Compare SPECIAL ORDER Quick view Details Honda | sku: NR_12200-Z1C-406 Cylinder Head, GX390, UT1 (big port), Bare, Genuine Honda MSRP: Now: $71.99 Add to Cart Compare Quick view Details sku: NR_90042-ZE8-000-CLONE Carb Stud 132mm GX390 predator 420 MSRP: Now: $3.99 Add to Cart Compare SPECIAL ORDER Quick view Details sku: NR_HEAD-13HP-CLONE-BARE Cylinder Head, Honda GX390 Bare MSRP: Now: $69.99 Add to Cart Compare Quick view Details sku: NR_390MUDMOTOREXH-LOOP Mud Boat Loop Header GX390 Predator 420 13-15HP Clone MSRP: Now: $93.99 View Details Compare Quick view Details sku: NR_390MUDMOTOREXH Mud Boat Header GX390 Predator 420 13-15HP Clone MSRP: Now: $54.99 Add to Cart Compare Quick view Details sku: NR_420PISTONKIT 90mm Flat Top Piston, for 420 OHV & GX390 Engines MSRP: Now: $29.99 Add to Cart Compare Quick view NR RACING | sku: NR_DLRET-390-ALUM Aluminum Retainer for 6.5 mm Valves Aluminum Retainer for use with split keepers. Use with HD/Dual Springs & SS Valves. 6.5mm Valve Stem RETAINERS ARE SOLD INDIVIDUALLY - 2 REQUIRED PER MOTOR KEEPERS ARE NOT INCLUDED - ORDER SEPARATE Use Keeper set part# NR_MD016483 MSRP: Now: $6.99 Add to Cart Compare Quick view NR RACING | sku: NR_VAL32-65-3465 Stainless Valve 31.5 mm x 6.5 mm 31.5mm face x 6.5mm stem x 3.465" Long. Stainless Steel. Requires Aluminum or Titanium retainers and split keepers. +.100 Longer than stock Used for GX390 Oversize Exhaust Valves and many 13/15 HP OHV Motors. Note: Valve may be coated or un-coated and... MSRP: Now: $31.99 View Details Compare Quick view NR RACING | sku: NR_VAL35-65-3465 Stainless Valve 35 mm x 6.5 mm 35mm face x 6.5mm stem x 3.465" Long. Stainless Steel. Requires Aluminum or Titanium retainers and split keepers. +.100 Longer than stock Used for GX390/Predator 420 Intake valve. Measure the existing valve before purchasing as they may be different... MSRP: Now: $31.99 View Details Compare Quick view NONE | sku: ARC_DJ-3282 DJ-3282 Wrist Pin Honda GX340/390 Stock wristpin for the Honda GX340/390 MSRP: Now: $10.50 Add to Cart Compare Quick view NONE | sku: ARC_DJ-3330S DJ-3330S GX390 Metal Exhaust Gasket GX390 Metal Exhaust Gasket MSRP: Now: $2.12 View Details Compare Quick view NONE | sku: ARC_6623-E ARC 6623-E Electric/Pull Start Billet Flywheel GX390 Predator 420 13-16HP Clone Engines Now available for electric or pull start! Our non-adjustable billet SFI Certified flywheel model for the Honda GX340 and GX390 engines is now both electric and pull start capable. The key way is fixed in the stock position of 24 degrees with a... MSRP: Now: $229.95 Add to Cart Compare Quick view Honda | sku: NR_12200-Z1C-406 Cylinder Head, GX390, UT1 (big port), Bare, Genuine Honda Head is finished but does not include Valves, Studs, springs, guide plates, seals, etc. For Honda GX390 and Predator 420 NON-HEMI MSRP: Now: $71.99 Add to Cart Compare Quick view sku: NR_90042-ZE8-000-CLONE Carb Stud 132mm GX390 predator 420 Aftermarket replacement carb stud for GX340/390, Predator 420, 13-16HP Clone engines 132 mm. end to end. Sold individually MSRP: Now: $3.99 Add to Cart Compare Quick view sku: NR_HEAD-13HP-CLONE-BARE Cylinder Head, Honda GX390 Bare Heads are finished and ready for assembly, but do not include Valves, Studs, springs, guide plates, seals, etc. Picture is for reference only MSRP: Now: $69.99 Add to Cart Compare Quick view sku: NR_390MUDMOTOREXH-LOOP Mud Boat Loop Header GX390 Predator 420 13-15HP Clone Header, Mud Motor & Boat, High-Performance Loop - GX270, GX390, & 420cc Predator High-Performance Loop Pipe for modified Mud MotorsExhaust designed to exit parallel with the output shaft. For Mud Boats. Fits GX390s, 420 Predators, and most... MSRP: Now: $93.99 View Details Compare Quick view sku: NR_390MUDMOTOREXH Mud Boat Header GX390 Predator 420 13-15HP Clone Exhaust System (Header), Mud Motor, Mud Skipper, & Long Shaft - GX270, GX390, & 420cc Predator Exhaust designed to exit parallel with the output shaft. For Mud Boats. Muffler IncludedFits GX240 to GX390, 13/15 hp Chinese OHVs, & 420 Predators MSRP: Now: $54.99 Add to Cart Compare Quick view sku: NR_420PISTONKIT 90mm Flat Top Piston, for 420 OHV & GX390 Engines 90mm Aftermarket Flat-top Piston for big bore GX390s. Fits stock bore on 420 Predators (non-hemi). GX390s Blocks can be bored to accept this piston407cc using stock crank,433 with +.160 Stroker Cranks,440cc with .200 CrankIncludes Piston & Rings (... MSRP: Now: $29.99 Add to Cart Compare Previous 1 2 3 4 5 6 7 8 9 10 11 Next Previous 1 2 3 4 5 6 7 8 9 10 11 Next Compare Selected × OK
Quick view Details NR RACING | sku: NR_VAL32-65-3465 Stainless Valve 31.5 mm x 6.5 mm MSRP: Now: $31.99 View Details Compare Quick view Details NR RACING | sku: NR_VAL35-65-3465 Stainless Valve 35 mm x 6.5 mm MSRP: Now: $31.99 View Details Compare SPECIAL ORDER Quick view Details NONE | sku: ARC_DJ-3282 DJ-3282 Wrist Pin Honda GX340/390 MSRP: Now: $10.50 Add to Cart Compare Quick view Details NONE | sku: ARC_DJ-3330S DJ-3330S GX390 Metal Exhaust Gasket MSRP: Now: $2.12 View Details Compare Quick view Details NONE | sku: ARC_6623-E ARC 6623-E Electric/Pull Start Billet Flywheel GX390 Predator 420 13-16HP Clone Engines MSRP: Now: $229.95 Add to Cart Compare SPECIAL ORDER Quick view Details Honda | sku: NR_12200-Z1C-406 Cylinder Head, GX390, UT1 (big port), Bare, Genuine Honda MSRP: Now: $71.99 Add to Cart Compare Quick view Details sku: NR_90042-ZE8-000-CLONE Carb Stud 132mm GX390 predator 420 MSRP: Now: $3.99 Add to Cart Compare SPECIAL ORDER Quick view Details sku: NR_HEAD-13HP-CLONE-BARE Cylinder Head, Honda GX390 Bare MSRP: Now: $69.99 Add to Cart Compare Quick view Details sku: NR_390MUDMOTOREXH-LOOP Mud Boat Loop Header GX390 Predator 420 13-15HP Clone MSRP: Now: $93.99 View Details Compare Quick view Details sku: NR_390MUDMOTOREXH Mud Boat Header GX390 Predator 420 13-15HP Clone MSRP: Now: $54.99 Add to Cart Compare Quick view Details sku: NR_420PISTONKIT 90mm Flat Top Piston, for 420 OHV & GX390 Engines MSRP: Now: $29.99 Add to Cart Compare Quick view NR RACING | sku: NR_DLRET-390-ALUM Aluminum Retainer for 6.5 mm Valves Aluminum Retainer for use with split keepers. Use with HD/Dual Springs & SS Valves. 6.5mm Valve Stem RETAINERS ARE SOLD INDIVIDUALLY - 2 REQUIRED PER MOTOR KEEPERS ARE NOT INCLUDED - ORDER SEPARATE Use Keeper set part# NR_MD016483 MSRP: Now: $6.99 Add to Cart Compare Quick view NR RACING | sku: NR_VAL32-65-3465 Stainless Valve 31.5 mm x 6.5 mm 31.5mm face x 6.5mm stem x 3.465" Long. Stainless Steel. Requires Aluminum or Titanium retainers and split keepers. +.100 Longer than stock Used for GX390 Oversize Exhaust Valves and many 13/15 HP OHV Motors. Note: Valve may be coated or un-coated and... MSRP: Now: $31.99 View Details Compare Quick view NR RACING | sku: NR_VAL35-65-3465 Stainless Valve 35 mm x 6.5 mm 35mm face x 6.5mm stem x 3.465" Long. Stainless Steel. Requires Aluminum or Titanium retainers and split keepers. +.100 Longer than stock Used for GX390/Predator 420 Intake valve. Measure the existing valve before purchasing as they may be different... MSRP: Now: $31.99 View Details Compare Quick view NONE | sku: ARC_DJ-3282 DJ-3282 Wrist Pin Honda GX340/390 Stock wristpin for the Honda GX340/390 MSRP: Now: $10.50 Add to Cart Compare Quick view NONE | sku: ARC_DJ-3330S DJ-3330S GX390 Metal Exhaust Gasket GX390 Metal Exhaust Gasket MSRP: Now: $2.12 View Details Compare Quick view NONE | sku: ARC_6623-E ARC 6623-E Electric/Pull Start Billet Flywheel GX390 Predator 420 13-16HP Clone Engines Now available for electric or pull start! Our non-adjustable billet SFI Certified flywheel model for the Honda GX340 and GX390 engines is now both electric and pull start capable. The key way is fixed in the stock position of 24 degrees with a... MSRP: Now: $229.95 Add to Cart Compare Quick view Honda | sku: NR_12200-Z1C-406 Cylinder Head, GX390, UT1 (big port), Bare, Genuine Honda Head is finished but does not include Valves, Studs, springs, guide plates, seals, etc. For Honda GX390 and Predator 420 NON-HEMI MSRP: Now: $71.99 Add to Cart Compare Quick view sku: NR_90042-ZE8-000-CLONE Carb Stud 132mm GX390 predator 420 Aftermarket replacement carb stud for GX340/390, Predator 420, 13-16HP Clone engines 132 mm. end to end. Sold individually MSRP: Now: $3.99 Add to Cart Compare Quick view sku: NR_HEAD-13HP-CLONE-BARE Cylinder Head, Honda GX390 Bare Heads are finished and ready for assembly, but do not include Valves, Studs, springs, guide plates, seals, etc. Picture is for reference only MSRP: Now: $69.99 Add to Cart Compare Quick view sku: NR_390MUDMOTOREXH-LOOP Mud Boat Loop Header GX390 Predator 420 13-15HP Clone Header, Mud Motor & Boat, High-Performance Loop - GX270, GX390, & 420cc Predator High-Performance Loop Pipe for modified Mud MotorsExhaust designed to exit parallel with the output shaft. For Mud Boats. Fits GX390s, 420 Predators, and most... MSRP: Now: $93.99 View Details Compare Quick view sku: NR_390MUDMOTOREXH Mud Boat Header GX390 Predator 420 13-15HP Clone Exhaust System (Header), Mud Motor, Mud Skipper, & Long Shaft - GX270, GX390, & 420cc Predator Exhaust designed to exit parallel with the output shaft. For Mud Boats. Muffler IncludedFits GX240 to GX390, 13/15 hp Chinese OHVs, & 420 Predators MSRP: Now: $54.99 Add to Cart Compare Quick view sku: NR_420PISTONKIT 90mm Flat Top Piston, for 420 OHV & GX390 Engines 90mm Aftermarket Flat-top Piston for big bore GX390s. Fits stock bore on 420 Predators (non-hemi). GX390s Blocks can be bored to accept this piston407cc using stock crank,433 with +.160 Stroker Cranks,440cc with .200 CrankIncludes Piston & Rings (... MSRP: Now: $29.99 Add to Cart Compare Previous 1 2 3 4 5 6 7 8 9 10 11 Next Previous 1 2 3 4 5 6 7 8 9 10 11 Next Compare Selected × OK
Quick view Details NR RACING | sku: NR_VAL35-65-3465 Stainless Valve 35 mm x 6.5 mm MSRP: Now: $31.99 View Details Compare SPECIAL ORDER Quick view Details NONE | sku: ARC_DJ-3282 DJ-3282 Wrist Pin Honda GX340/390 MSRP: Now: $10.50 Add to Cart Compare Quick view Details NONE | sku: ARC_DJ-3330S DJ-3330S GX390 Metal Exhaust Gasket MSRP: Now: $2.12 View Details Compare Quick view Details NONE | sku: ARC_6623-E ARC 6623-E Electric/Pull Start Billet Flywheel GX390 Predator 420 13-16HP Clone Engines MSRP: Now: $229.95 Add to Cart Compare SPECIAL ORDER Quick view Details Honda | sku: NR_12200-Z1C-406 Cylinder Head, GX390, UT1 (big port), Bare, Genuine Honda MSRP: Now: $71.99 Add to Cart Compare Quick view Details sku: NR_90042-ZE8-000-CLONE Carb Stud 132mm GX390 predator 420 MSRP: Now: $3.99 Add to Cart Compare SPECIAL ORDER Quick view Details sku: NR_HEAD-13HP-CLONE-BARE Cylinder Head, Honda GX390 Bare MSRP: Now: $69.99 Add to Cart Compare Quick view Details sku: NR_390MUDMOTOREXH-LOOP Mud Boat Loop Header GX390 Predator 420 13-15HP Clone MSRP: Now: $93.99 View Details Compare Quick view Details sku: NR_390MUDMOTOREXH Mud Boat Header GX390 Predator 420 13-15HP Clone MSRP: Now: $54.99 Add to Cart Compare Quick view Details sku: NR_420PISTONKIT 90mm Flat Top Piston, for 420 OHV & GX390 Engines MSRP: Now: $29.99 Add to Cart Compare Quick view NR RACING | sku: NR_DLRET-390-ALUM Aluminum Retainer for 6.5 mm Valves Aluminum Retainer for use with split keepers. Use with HD/Dual Springs & SS Valves. 6.5mm Valve Stem RETAINERS ARE SOLD INDIVIDUALLY - 2 REQUIRED PER MOTOR KEEPERS ARE NOT INCLUDED - ORDER SEPARATE Use Keeper set part# NR_MD016483 MSRP: Now: $6.99 Add to Cart Compare Quick view NR RACING | sku: NR_VAL32-65-3465 Stainless Valve 31.5 mm x 6.5 mm 31.5mm face x 6.5mm stem x 3.465" Long. Stainless Steel. Requires Aluminum or Titanium retainers and split keepers. +.100 Longer than stock Used for GX390 Oversize Exhaust Valves and many 13/15 HP OHV Motors. Note: Valve may be coated or un-coated and... MSRP: Now: $31.99 View Details Compare Quick view NR RACING | sku: NR_VAL35-65-3465 Stainless Valve 35 mm x 6.5 mm 35mm face x 6.5mm stem x 3.465" Long. Stainless Steel. Requires Aluminum or Titanium retainers and split keepers. +.100 Longer than stock Used for GX390/Predator 420 Intake valve. Measure the existing valve before purchasing as they may be different... MSRP: Now: $31.99 View Details Compare Quick view NONE | sku: ARC_DJ-3282 DJ-3282 Wrist Pin Honda GX340/390 Stock wristpin for the Honda GX340/390 MSRP: Now: $10.50 Add to Cart Compare Quick view NONE | sku: ARC_DJ-3330S DJ-3330S GX390 Metal Exhaust Gasket GX390 Metal Exhaust Gasket MSRP: Now: $2.12 View Details Compare Quick view NONE | sku: ARC_6623-E ARC 6623-E Electric/Pull Start Billet Flywheel GX390 Predator 420 13-16HP Clone Engines Now available for electric or pull start! Our non-adjustable billet SFI Certified flywheel model for the Honda GX340 and GX390 engines is now both electric and pull start capable. The key way is fixed in the stock position of 24 degrees with a... MSRP: Now: $229.95 Add to Cart Compare Quick view Honda | sku: NR_12200-Z1C-406 Cylinder Head, GX390, UT1 (big port), Bare, Genuine Honda Head is finished but does not include Valves, Studs, springs, guide plates, seals, etc. For Honda GX390 and Predator 420 NON-HEMI MSRP: Now: $71.99 Add to Cart Compare Quick view sku: NR_90042-ZE8-000-CLONE Carb Stud 132mm GX390 predator 420 Aftermarket replacement carb stud for GX340/390, Predator 420, 13-16HP Clone engines 132 mm. end to end. Sold individually MSRP: Now: $3.99 Add to Cart Compare Quick view sku: NR_HEAD-13HP-CLONE-BARE Cylinder Head, Honda GX390 Bare Heads are finished and ready for assembly, but do not include Valves, Studs, springs, guide plates, seals, etc. Picture is for reference only MSRP: Now: $69.99 Add to Cart Compare Quick view sku: NR_390MUDMOTOREXH-LOOP Mud Boat Loop Header GX390 Predator 420 13-15HP Clone Header, Mud Motor & Boat, High-Performance Loop - GX270, GX390, & 420cc Predator High-Performance Loop Pipe for modified Mud MotorsExhaust designed to exit parallel with the output shaft. For Mud Boats. Fits GX390s, 420 Predators, and most... MSRP: Now: $93.99 View Details Compare Quick view sku: NR_390MUDMOTOREXH Mud Boat Header GX390 Predator 420 13-15HP Clone Exhaust System (Header), Mud Motor, Mud Skipper, & Long Shaft - GX270, GX390, & 420cc Predator Exhaust designed to exit parallel with the output shaft. For Mud Boats. Muffler IncludedFits GX240 to GX390, 13/15 hp Chinese OHVs, & 420 Predators MSRP: Now: $54.99 Add to Cart Compare Quick view sku: NR_420PISTONKIT 90mm Flat Top Piston, for 420 OHV & GX390 Engines 90mm Aftermarket Flat-top Piston for big bore GX390s. Fits stock bore on 420 Predators (non-hemi). GX390s Blocks can be bored to accept this piston407cc using stock crank,433 with +.160 Stroker Cranks,440cc with .200 CrankIncludes Piston & Rings (... MSRP: Now: $29.99 Add to Cart Compare Previous 1 2 3 4 5 6 7 8 9 10 11 Next Previous 1 2 3 4 5 6 7 8 9 10 11 Next Compare Selected × OK
SPECIAL ORDER Quick view Details NONE | sku: ARC_DJ-3282 DJ-3282 Wrist Pin Honda GX340/390 MSRP: Now: $10.50 Add to Cart Compare Quick view Details NONE | sku: ARC_DJ-3330S DJ-3330S GX390 Metal Exhaust Gasket MSRP: Now: $2.12 View Details Compare Quick view Details NONE | sku: ARC_6623-E ARC 6623-E Electric/Pull Start Billet Flywheel GX390 Predator 420 13-16HP Clone Engines MSRP: Now: $229.95 Add to Cart Compare SPECIAL ORDER Quick view Details Honda | sku: NR_12200-Z1C-406 Cylinder Head, GX390, UT1 (big port), Bare, Genuine Honda MSRP: Now: $71.99 Add to Cart Compare Quick view Details sku: NR_90042-ZE8-000-CLONE Carb Stud 132mm GX390 predator 420 MSRP: Now: $3.99 Add to Cart Compare SPECIAL ORDER Quick view Details sku: NR_HEAD-13HP-CLONE-BARE Cylinder Head, Honda GX390 Bare MSRP: Now: $69.99 Add to Cart Compare Quick view Details sku: NR_390MUDMOTOREXH-LOOP Mud Boat Loop Header GX390 Predator 420 13-15HP Clone MSRP: Now: $93.99 View Details Compare Quick view Details sku: NR_390MUDMOTOREXH Mud Boat Header GX390 Predator 420 13-15HP Clone MSRP: Now: $54.99 Add to Cart Compare Quick view Details sku: NR_420PISTONKIT 90mm Flat Top Piston, for 420 OHV & GX390 Engines MSRP: Now: $29.99 Add to Cart Compare Quick view NR RACING | sku: NR_DLRET-390-ALUM Aluminum Retainer for 6.5 mm Valves Aluminum Retainer for use with split keepers. Use with HD/Dual Springs & SS Valves. 6.5mm Valve Stem RETAINERS ARE SOLD INDIVIDUALLY - 2 REQUIRED PER MOTOR KEEPERS ARE NOT INCLUDED - ORDER SEPARATE Use Keeper set part# NR_MD016483 MSRP: Now: $6.99 Add to Cart Compare Quick view NR RACING | sku: NR_VAL32-65-3465 Stainless Valve 31.5 mm x 6.5 mm 31.5mm face x 6.5mm stem x 3.465" Long. Stainless Steel. Requires Aluminum or Titanium retainers and split keepers. +.100 Longer than stock Used for GX390 Oversize Exhaust Valves and many 13/15 HP OHV Motors. Note: Valve may be coated or un-coated and... MSRP: Now: $31.99 View Details Compare Quick view NR RACING | sku: NR_VAL35-65-3465 Stainless Valve 35 mm x 6.5 mm 35mm face x 6.5mm stem x 3.465" Long. Stainless Steel. Requires Aluminum or Titanium retainers and split keepers. +.100 Longer than stock Used for GX390/Predator 420 Intake valve. Measure the existing valve before purchasing as they may be different... MSRP: Now: $31.99 View Details Compare Quick view NONE | sku: ARC_DJ-3282 DJ-3282 Wrist Pin Honda GX340/390 Stock wristpin for the Honda GX340/390 MSRP: Now: $10.50 Add to Cart Compare Quick view NONE | sku: ARC_DJ-3330S DJ-3330S GX390 Metal Exhaust Gasket GX390 Metal Exhaust Gasket MSRP: Now: $2.12 View Details Compare Quick view NONE | sku: ARC_6623-E ARC 6623-E Electric/Pull Start Billet Flywheel GX390 Predator 420 13-16HP Clone Engines Now available for electric or pull start! Our non-adjustable billet SFI Certified flywheel model for the Honda GX340 and GX390 engines is now both electric and pull start capable. The key way is fixed in the stock position of 24 degrees with a... MSRP: Now: $229.95 Add to Cart Compare Quick view Honda | sku: NR_12200-Z1C-406 Cylinder Head, GX390, UT1 (big port), Bare, Genuine Honda Head is finished but does not include Valves, Studs, springs, guide plates, seals, etc. For Honda GX390 and Predator 420 NON-HEMI MSRP: Now: $71.99 Add to Cart Compare Quick view sku: NR_90042-ZE8-000-CLONE Carb Stud 132mm GX390 predator 420 Aftermarket replacement carb stud for GX340/390, Predator 420, 13-16HP Clone engines 132 mm. end to end. Sold individually MSRP: Now: $3.99 Add to Cart Compare Quick view sku: NR_HEAD-13HP-CLONE-BARE Cylinder Head, Honda GX390 Bare Heads are finished and ready for assembly, but do not include Valves, Studs, springs, guide plates, seals, etc. Picture is for reference only MSRP: Now: $69.99 Add to Cart Compare Quick view sku: NR_390MUDMOTOREXH-LOOP Mud Boat Loop Header GX390 Predator 420 13-15HP Clone Header, Mud Motor & Boat, High-Performance Loop - GX270, GX390, & 420cc Predator High-Performance Loop Pipe for modified Mud MotorsExhaust designed to exit parallel with the output shaft. For Mud Boats. Fits GX390s, 420 Predators, and most... MSRP: Now: $93.99 View Details Compare Quick view sku: NR_390MUDMOTOREXH Mud Boat Header GX390 Predator 420 13-15HP Clone Exhaust System (Header), Mud Motor, Mud Skipper, & Long Shaft - GX270, GX390, & 420cc Predator Exhaust designed to exit parallel with the output shaft. For Mud Boats. Muffler IncludedFits GX240 to GX390, 13/15 hp Chinese OHVs, & 420 Predators MSRP: Now: $54.99 Add to Cart Compare Quick view sku: NR_420PISTONKIT 90mm Flat Top Piston, for 420 OHV & GX390 Engines 90mm Aftermarket Flat-top Piston for big bore GX390s. Fits stock bore on 420 Predators (non-hemi). GX390s Blocks can be bored to accept this piston407cc using stock crank,433 with +.160 Stroker Cranks,440cc with .200 CrankIncludes Piston & Rings (... MSRP: Now: $29.99 Add to Cart Compare Previous 1 2 3 4 5 6 7 8 9 10 11 Next Previous 1 2 3 4 5 6 7 8 9 10 11 Next Compare Selected × OK
Quick view Details NONE | sku: ARC_DJ-3330S DJ-3330S GX390 Metal Exhaust Gasket MSRP: Now: $2.12 View Details Compare Quick view Details NONE | sku: ARC_6623-E ARC 6623-E Electric/Pull Start Billet Flywheel GX390 Predator 420 13-16HP Clone Engines MSRP: Now: $229.95 Add to Cart Compare SPECIAL ORDER Quick view Details Honda | sku: NR_12200-Z1C-406 Cylinder Head, GX390, UT1 (big port), Bare, Genuine Honda MSRP: Now: $71.99 Add to Cart Compare Quick view Details sku: NR_90042-ZE8-000-CLONE Carb Stud 132mm GX390 predator 420 MSRP: Now: $3.99 Add to Cart Compare SPECIAL ORDER Quick view Details sku: NR_HEAD-13HP-CLONE-BARE Cylinder Head, Honda GX390 Bare MSRP: Now: $69.99 Add to Cart Compare Quick view Details sku: NR_390MUDMOTOREXH-LOOP Mud Boat Loop Header GX390 Predator 420 13-15HP Clone MSRP: Now: $93.99 View Details Compare Quick view Details sku: NR_390MUDMOTOREXH Mud Boat Header GX390 Predator 420 13-15HP Clone MSRP: Now: $54.99 Add to Cart Compare Quick view Details sku: NR_420PISTONKIT 90mm Flat Top Piston, for 420 OHV & GX390 Engines MSRP: Now: $29.99 Add to Cart Compare Quick view NR RACING | sku: NR_DLRET-390-ALUM Aluminum Retainer for 6.5 mm Valves Aluminum Retainer for use with split keepers. Use with HD/Dual Springs & SS Valves. 6.5mm Valve Stem RETAINERS ARE SOLD INDIVIDUALLY - 2 REQUIRED PER MOTOR KEEPERS ARE NOT INCLUDED - ORDER SEPARATE Use Keeper set part# NR_MD016483 MSRP: Now: $6.99 Add to Cart Compare Quick view NR RACING | sku: NR_VAL32-65-3465 Stainless Valve 31.5 mm x 6.5 mm 31.5mm face x 6.5mm stem x 3.465" Long. Stainless Steel. Requires Aluminum or Titanium retainers and split keepers. +.100 Longer than stock Used for GX390 Oversize Exhaust Valves and many 13/15 HP OHV Motors. Note: Valve may be coated or un-coated and... MSRP: Now: $31.99 View Details Compare Quick view NR RACING | sku: NR_VAL35-65-3465 Stainless Valve 35 mm x 6.5 mm 35mm face x 6.5mm stem x 3.465" Long. Stainless Steel. Requires Aluminum or Titanium retainers and split keepers. +.100 Longer than stock Used for GX390/Predator 420 Intake valve. Measure the existing valve before purchasing as they may be different... MSRP: Now: $31.99 View Details Compare Quick view NONE | sku: ARC_DJ-3282 DJ-3282 Wrist Pin Honda GX340/390 Stock wristpin for the Honda GX340/390 MSRP: Now: $10.50 Add to Cart Compare Quick view NONE | sku: ARC_DJ-3330S DJ-3330S GX390 Metal Exhaust Gasket GX390 Metal Exhaust Gasket MSRP: Now: $2.12 View Details Compare Quick view NONE | sku: ARC_6623-E ARC 6623-E Electric/Pull Start Billet Flywheel GX390 Predator 420 13-16HP Clone Engines Now available for electric or pull start! Our non-adjustable billet SFI Certified flywheel model for the Honda GX340 and GX390 engines is now both electric and pull start capable. The key way is fixed in the stock position of 24 degrees with a... MSRP: Now: $229.95 Add to Cart Compare Quick view Honda | sku: NR_12200-Z1C-406 Cylinder Head, GX390, UT1 (big port), Bare, Genuine Honda Head is finished but does not include Valves, Studs, springs, guide plates, seals, etc. For Honda GX390 and Predator 420 NON-HEMI MSRP: Now: $71.99 Add to Cart Compare Quick view sku: NR_90042-ZE8-000-CLONE Carb Stud 132mm GX390 predator 420 Aftermarket replacement carb stud for GX340/390, Predator 420, 13-16HP Clone engines 132 mm. end to end. Sold individually MSRP: Now: $3.99 Add to Cart Compare Quick view sku: NR_HEAD-13HP-CLONE-BARE Cylinder Head, Honda GX390 Bare Heads are finished and ready for assembly, but do not include Valves, Studs, springs, guide plates, seals, etc. Picture is for reference only MSRP: Now: $69.99 Add to Cart Compare Quick view sku: NR_390MUDMOTOREXH-LOOP Mud Boat Loop Header GX390 Predator 420 13-15HP Clone Header, Mud Motor & Boat, High-Performance Loop - GX270, GX390, & 420cc Predator High-Performance Loop Pipe for modified Mud MotorsExhaust designed to exit parallel with the output shaft. For Mud Boats. Fits GX390s, 420 Predators, and most... MSRP: Now: $93.99 View Details Compare Quick view sku: NR_390MUDMOTOREXH Mud Boat Header GX390 Predator 420 13-15HP Clone Exhaust System (Header), Mud Motor, Mud Skipper, & Long Shaft - GX270, GX390, & 420cc Predator Exhaust designed to exit parallel with the output shaft. For Mud Boats. Muffler IncludedFits GX240 to GX390, 13/15 hp Chinese OHVs, & 420 Predators MSRP: Now: $54.99 Add to Cart Compare Quick view sku: NR_420PISTONKIT 90mm Flat Top Piston, for 420 OHV & GX390 Engines 90mm Aftermarket Flat-top Piston for big bore GX390s. Fits stock bore on 420 Predators (non-hemi). GX390s Blocks can be bored to accept this piston407cc using stock crank,433 with +.160 Stroker Cranks,440cc with .200 CrankIncludes Piston & Rings (... MSRP: Now: $29.99 Add to Cart Compare Previous 1 2 3 4 5 6 7 8 9 10 11 Next Previous 1 2 3 4 5 6 7 8 9 10 11 Next Compare Selected × OK
Quick view Details NONE | sku: ARC_6623-E ARC 6623-E Electric/Pull Start Billet Flywheel GX390 Predator 420 13-16HP Clone Engines MSRP: Now: $229.95 Add to Cart Compare SPECIAL ORDER Quick view Details Honda | sku: NR_12200-Z1C-406 Cylinder Head, GX390, UT1 (big port), Bare, Genuine Honda MSRP: Now: $71.99 Add to Cart Compare Quick view Details sku: NR_90042-ZE8-000-CLONE Carb Stud 132mm GX390 predator 420 MSRP: Now: $3.99 Add to Cart Compare SPECIAL ORDER Quick view Details sku: NR_HEAD-13HP-CLONE-BARE Cylinder Head, Honda GX390 Bare MSRP: Now: $69.99 Add to Cart Compare Quick view Details sku: NR_390MUDMOTOREXH-LOOP Mud Boat Loop Header GX390 Predator 420 13-15HP Clone MSRP: Now: $93.99 View Details Compare Quick view Details sku: NR_390MUDMOTOREXH Mud Boat Header GX390 Predator 420 13-15HP Clone MSRP: Now: $54.99 Add to Cart Compare Quick view Details sku: NR_420PISTONKIT 90mm Flat Top Piston, for 420 OHV & GX390 Engines MSRP: Now: $29.99 Add to Cart Compare Quick view NR RACING | sku: NR_DLRET-390-ALUM Aluminum Retainer for 6.5 mm Valves Aluminum Retainer for use with split keepers. Use with HD/Dual Springs & SS Valves. 6.5mm Valve Stem RETAINERS ARE SOLD INDIVIDUALLY - 2 REQUIRED PER MOTOR KEEPERS ARE NOT INCLUDED - ORDER SEPARATE Use Keeper set part# NR_MD016483 MSRP: Now: $6.99 Add to Cart Compare Quick view NR RACING | sku: NR_VAL32-65-3465 Stainless Valve 31.5 mm x 6.5 mm 31.5mm face x 6.5mm stem x 3.465" Long. Stainless Steel. Requires Aluminum or Titanium retainers and split keepers. +.100 Longer than stock Used for GX390 Oversize Exhaust Valves and many 13/15 HP OHV Motors. Note: Valve may be coated or un-coated and... MSRP: Now: $31.99 View Details Compare Quick view NR RACING | sku: NR_VAL35-65-3465 Stainless Valve 35 mm x 6.5 mm 35mm face x 6.5mm stem x 3.465" Long. Stainless Steel. Requires Aluminum or Titanium retainers and split keepers. +.100 Longer than stock Used for GX390/Predator 420 Intake valve. Measure the existing valve before purchasing as they may be different... MSRP: Now: $31.99 View Details Compare Quick view NONE | sku: ARC_DJ-3282 DJ-3282 Wrist Pin Honda GX340/390 Stock wristpin for the Honda GX340/390 MSRP: Now: $10.50 Add to Cart Compare Quick view NONE | sku: ARC_DJ-3330S DJ-3330S GX390 Metal Exhaust Gasket GX390 Metal Exhaust Gasket MSRP: Now: $2.12 View Details Compare Quick view NONE | sku: ARC_6623-E ARC 6623-E Electric/Pull Start Billet Flywheel GX390 Predator 420 13-16HP Clone Engines Now available for electric or pull start! Our non-adjustable billet SFI Certified flywheel model for the Honda GX340 and GX390 engines is now both electric and pull start capable. The key way is fixed in the stock position of 24 degrees with a... MSRP: Now: $229.95 Add to Cart Compare Quick view Honda | sku: NR_12200-Z1C-406 Cylinder Head, GX390, UT1 (big port), Bare, Genuine Honda Head is finished but does not include Valves, Studs, springs, guide plates, seals, etc. For Honda GX390 and Predator 420 NON-HEMI MSRP: Now: $71.99 Add to Cart Compare Quick view sku: NR_90042-ZE8-000-CLONE Carb Stud 132mm GX390 predator 420 Aftermarket replacement carb stud for GX340/390, Predator 420, 13-16HP Clone engines 132 mm. end to end. Sold individually MSRP: Now: $3.99 Add to Cart Compare Quick view sku: NR_HEAD-13HP-CLONE-BARE Cylinder Head, Honda GX390 Bare Heads are finished and ready for assembly, but do not include Valves, Studs, springs, guide plates, seals, etc. Picture is for reference only MSRP: Now: $69.99 Add to Cart Compare Quick view sku: NR_390MUDMOTOREXH-LOOP Mud Boat Loop Header GX390 Predator 420 13-15HP Clone Header, Mud Motor & Boat, High-Performance Loop - GX270, GX390, & 420cc Predator High-Performance Loop Pipe for modified Mud MotorsExhaust designed to exit parallel with the output shaft. For Mud Boats. Fits GX390s, 420 Predators, and most... MSRP: Now: $93.99 View Details Compare Quick view sku: NR_390MUDMOTOREXH Mud Boat Header GX390 Predator 420 13-15HP Clone Exhaust System (Header), Mud Motor, Mud Skipper, & Long Shaft - GX270, GX390, & 420cc Predator Exhaust designed to exit parallel with the output shaft. For Mud Boats. Muffler IncludedFits GX240 to GX390, 13/15 hp Chinese OHVs, & 420 Predators MSRP: Now: $54.99 Add to Cart Compare Quick view sku: NR_420PISTONKIT 90mm Flat Top Piston, for 420 OHV & GX390 Engines 90mm Aftermarket Flat-top Piston for big bore GX390s. Fits stock bore on 420 Predators (non-hemi). GX390s Blocks can be bored to accept this piston407cc using stock crank,433 with +.160 Stroker Cranks,440cc with .200 CrankIncludes Piston & Rings (... MSRP: Now: $29.99 Add to Cart Compare Previous 1 2 3 4 5 6 7 8 9 10 11 Next Previous 1 2 3 4 5 6 7 8 9 10 11 Next Compare Selected × OK
SPECIAL ORDER Quick view Details Honda | sku: NR_12200-Z1C-406 Cylinder Head, GX390, UT1 (big port), Bare, Genuine Honda MSRP: Now: $71.99 Add to Cart Compare Quick view Details sku: NR_90042-ZE8-000-CLONE Carb Stud 132mm GX390 predator 420 MSRP: Now: $3.99 Add to Cart Compare SPECIAL ORDER Quick view Details sku: NR_HEAD-13HP-CLONE-BARE Cylinder Head, Honda GX390 Bare MSRP: Now: $69.99 Add to Cart Compare Quick view Details sku: NR_390MUDMOTOREXH-LOOP Mud Boat Loop Header GX390 Predator 420 13-15HP Clone MSRP: Now: $93.99 View Details Compare Quick view Details sku: NR_390MUDMOTOREXH Mud Boat Header GX390 Predator 420 13-15HP Clone MSRP: Now: $54.99 Add to Cart Compare Quick view Details sku: NR_420PISTONKIT 90mm Flat Top Piston, for 420 OHV & GX390 Engines MSRP: Now: $29.99 Add to Cart Compare Quick view NR RACING | sku: NR_DLRET-390-ALUM Aluminum Retainer for 6.5 mm Valves Aluminum Retainer for use with split keepers. Use with HD/Dual Springs & SS Valves. 6.5mm Valve Stem RETAINERS ARE SOLD INDIVIDUALLY - 2 REQUIRED PER MOTOR KEEPERS ARE NOT INCLUDED - ORDER SEPARATE Use Keeper set part# NR_MD016483 MSRP: Now: $6.99 Add to Cart Compare Quick view NR RACING | sku: NR_VAL32-65-3465 Stainless Valve 31.5 mm x 6.5 mm 31.5mm face x 6.5mm stem x 3.465" Long. Stainless Steel. Requires Aluminum or Titanium retainers and split keepers. +.100 Longer than stock Used for GX390 Oversize Exhaust Valves and many 13/15 HP OHV Motors. Note: Valve may be coated or un-coated and... MSRP: Now: $31.99 View Details Compare Quick view NR RACING | sku: NR_VAL35-65-3465 Stainless Valve 35 mm x 6.5 mm 35mm face x 6.5mm stem x 3.465" Long. Stainless Steel. Requires Aluminum or Titanium retainers and split keepers. +.100 Longer than stock Used for GX390/Predator 420 Intake valve. Measure the existing valve before purchasing as they may be different... MSRP: Now: $31.99 View Details Compare Quick view NONE | sku: ARC_DJ-3282 DJ-3282 Wrist Pin Honda GX340/390 Stock wristpin for the Honda GX340/390 MSRP: Now: $10.50 Add to Cart Compare Quick view NONE | sku: ARC_DJ-3330S DJ-3330S GX390 Metal Exhaust Gasket GX390 Metal Exhaust Gasket MSRP: Now: $2.12 View Details Compare Quick view NONE | sku: ARC_6623-E ARC 6623-E Electric/Pull Start Billet Flywheel GX390 Predator 420 13-16HP Clone Engines Now available for electric or pull start! Our non-adjustable billet SFI Certified flywheel model for the Honda GX340 and GX390 engines is now both electric and pull start capable. The key way is fixed in the stock position of 24 degrees with a... MSRP: Now: $229.95 Add to Cart Compare Quick view Honda | sku: NR_12200-Z1C-406 Cylinder Head, GX390, UT1 (big port), Bare, Genuine Honda Head is finished but does not include Valves, Studs, springs, guide plates, seals, etc. For Honda GX390 and Predator 420 NON-HEMI MSRP: Now: $71.99 Add to Cart Compare Quick view sku: NR_90042-ZE8-000-CLONE Carb Stud 132mm GX390 predator 420 Aftermarket replacement carb stud for GX340/390, Predator 420, 13-16HP Clone engines 132 mm. end to end. Sold individually MSRP: Now: $3.99 Add to Cart Compare Quick view sku: NR_HEAD-13HP-CLONE-BARE Cylinder Head, Honda GX390 Bare Heads are finished and ready for assembly, but do not include Valves, Studs, springs, guide plates, seals, etc. Picture is for reference only MSRP: Now: $69.99 Add to Cart Compare Quick view sku: NR_390MUDMOTOREXH-LOOP Mud Boat Loop Header GX390 Predator 420 13-15HP Clone Header, Mud Motor & Boat, High-Performance Loop - GX270, GX390, & 420cc Predator High-Performance Loop Pipe for modified Mud MotorsExhaust designed to exit parallel with the output shaft. For Mud Boats. Fits GX390s, 420 Predators, and most... MSRP: Now: $93.99 View Details Compare Quick view sku: NR_390MUDMOTOREXH Mud Boat Header GX390 Predator 420 13-15HP Clone Exhaust System (Header), Mud Motor, Mud Skipper, & Long Shaft - GX270, GX390, & 420cc Predator Exhaust designed to exit parallel with the output shaft. For Mud Boats. Muffler IncludedFits GX240 to GX390, 13/15 hp Chinese OHVs, & 420 Predators MSRP: Now: $54.99 Add to Cart Compare Quick view sku: NR_420PISTONKIT 90mm Flat Top Piston, for 420 OHV & GX390 Engines 90mm Aftermarket Flat-top Piston for big bore GX390s. Fits stock bore on 420 Predators (non-hemi). GX390s Blocks can be bored to accept this piston407cc using stock crank,433 with +.160 Stroker Cranks,440cc with .200 CrankIncludes Piston & Rings (... MSRP: Now: $29.99 Add to Cart Compare Previous 1 2 3 4 5 6 7 8 9 10 11 Next Previous 1 2 3 4 5 6 7 8 9 10 11 Next Compare Selected × OK
Quick view Details sku: NR_90042-ZE8-000-CLONE Carb Stud 132mm GX390 predator 420 MSRP: Now: $3.99 Add to Cart Compare SPECIAL ORDER Quick view Details sku: NR_HEAD-13HP-CLONE-BARE Cylinder Head, Honda GX390 Bare MSRP: Now: $69.99 Add to Cart Compare Quick view Details sku: NR_390MUDMOTOREXH-LOOP Mud Boat Loop Header GX390 Predator 420 13-15HP Clone MSRP: Now: $93.99 View Details Compare Quick view Details sku: NR_390MUDMOTOREXH Mud Boat Header GX390 Predator 420 13-15HP Clone MSRP: Now: $54.99 Add to Cart Compare Quick view Details sku: NR_420PISTONKIT 90mm Flat Top Piston, for 420 OHV & GX390 Engines MSRP: Now: $29.99 Add to Cart Compare Quick view NR RACING | sku: NR_DLRET-390-ALUM Aluminum Retainer for 6.5 mm Valves Aluminum Retainer for use with split keepers. Use with HD/Dual Springs & SS Valves. 6.5mm Valve Stem RETAINERS ARE SOLD INDIVIDUALLY - 2 REQUIRED PER MOTOR KEEPERS ARE NOT INCLUDED - ORDER SEPARATE Use Keeper set part# NR_MD016483 MSRP: Now: $6.99 Add to Cart Compare Quick view NR RACING | sku: NR_VAL32-65-3465 Stainless Valve 31.5 mm x 6.5 mm 31.5mm face x 6.5mm stem x 3.465" Long. Stainless Steel. Requires Aluminum or Titanium retainers and split keepers. +.100 Longer than stock Used for GX390 Oversize Exhaust Valves and many 13/15 HP OHV Motors. Note: Valve may be coated or un-coated and... MSRP: Now: $31.99 View Details Compare Quick view NR RACING | sku: NR_VAL35-65-3465 Stainless Valve 35 mm x 6.5 mm 35mm face x 6.5mm stem x 3.465" Long. Stainless Steel. Requires Aluminum or Titanium retainers and split keepers. +.100 Longer than stock Used for GX390/Predator 420 Intake valve. Measure the existing valve before purchasing as they may be different... MSRP: Now: $31.99 View Details Compare Quick view NONE | sku: ARC_DJ-3282 DJ-3282 Wrist Pin Honda GX340/390 Stock wristpin for the Honda GX340/390 MSRP: Now: $10.50 Add to Cart Compare Quick view NONE | sku: ARC_DJ-3330S DJ-3330S GX390 Metal Exhaust Gasket GX390 Metal Exhaust Gasket MSRP: Now: $2.12 View Details Compare Quick view NONE | sku: ARC_6623-E ARC 6623-E Electric/Pull Start Billet Flywheel GX390 Predator 420 13-16HP Clone Engines Now available for electric or pull start! Our non-adjustable billet SFI Certified flywheel model for the Honda GX340 and GX390 engines is now both electric and pull start capable. The key way is fixed in the stock position of 24 degrees with a... MSRP: Now: $229.95 Add to Cart Compare Quick view Honda | sku: NR_12200-Z1C-406 Cylinder Head, GX390, UT1 (big port), Bare, Genuine Honda Head is finished but does not include Valves, Studs, springs, guide plates, seals, etc. For Honda GX390 and Predator 420 NON-HEMI MSRP: Now: $71.99 Add to Cart Compare Quick view sku: NR_90042-ZE8-000-CLONE Carb Stud 132mm GX390 predator 420 Aftermarket replacement carb stud for GX340/390, Predator 420, 13-16HP Clone engines 132 mm. end to end. Sold individually MSRP: Now: $3.99 Add to Cart Compare Quick view sku: NR_HEAD-13HP-CLONE-BARE Cylinder Head, Honda GX390 Bare Heads are finished and ready for assembly, but do not include Valves, Studs, springs, guide plates, seals, etc. Picture is for reference only MSRP: Now: $69.99 Add to Cart Compare Quick view sku: NR_390MUDMOTOREXH-LOOP Mud Boat Loop Header GX390 Predator 420 13-15HP Clone Header, Mud Motor & Boat, High-Performance Loop - GX270, GX390, & 420cc Predator High-Performance Loop Pipe for modified Mud MotorsExhaust designed to exit parallel with the output shaft. For Mud Boats. Fits GX390s, 420 Predators, and most... MSRP: Now: $93.99 View Details Compare Quick view sku: NR_390MUDMOTOREXH Mud Boat Header GX390 Predator 420 13-15HP Clone Exhaust System (Header), Mud Motor, Mud Skipper, & Long Shaft - GX270, GX390, & 420cc Predator Exhaust designed to exit parallel with the output shaft. For Mud Boats. Muffler IncludedFits GX240 to GX390, 13/15 hp Chinese OHVs, & 420 Predators MSRP: Now: $54.99 Add to Cart Compare Quick view sku: NR_420PISTONKIT 90mm Flat Top Piston, for 420 OHV & GX390 Engines 90mm Aftermarket Flat-top Piston for big bore GX390s. Fits stock bore on 420 Predators (non-hemi). GX390s Blocks can be bored to accept this piston407cc using stock crank,433 with +.160 Stroker Cranks,440cc with .200 CrankIncludes Piston & Rings (... MSRP: Now: $29.99 Add to Cart Compare Previous 1 2 3 4 5 6 7 8 9 10 11 Next Previous 1 2 3 4 5 6 7 8 9 10 11 Next Compare Selected × OK
SPECIAL ORDER Quick view Details sku: NR_HEAD-13HP-CLONE-BARE Cylinder Head, Honda GX390 Bare MSRP: Now: $69.99 Add to Cart Compare Quick view Details sku: NR_390MUDMOTOREXH-LOOP Mud Boat Loop Header GX390 Predator 420 13-15HP Clone MSRP: Now: $93.99 View Details Compare Quick view Details sku: NR_390MUDMOTOREXH Mud Boat Header GX390 Predator 420 13-15HP Clone MSRP: Now: $54.99 Add to Cart Compare Quick view Details sku: NR_420PISTONKIT 90mm Flat Top Piston, for 420 OHV & GX390 Engines MSRP: Now: $29.99 Add to Cart Compare Quick view NR RACING | sku: NR_DLRET-390-ALUM Aluminum Retainer for 6.5 mm Valves Aluminum Retainer for use with split keepers. Use with HD/Dual Springs & SS Valves. 6.5mm Valve Stem RETAINERS ARE SOLD INDIVIDUALLY - 2 REQUIRED PER MOTOR KEEPERS ARE NOT INCLUDED - ORDER SEPARATE Use Keeper set part# NR_MD016483 MSRP: Now: $6.99 Add to Cart Compare Quick view NR RACING | sku: NR_VAL32-65-3465 Stainless Valve 31.5 mm x 6.5 mm 31.5mm face x 6.5mm stem x 3.465" Long. Stainless Steel. Requires Aluminum or Titanium retainers and split keepers. +.100 Longer than stock Used for GX390 Oversize Exhaust Valves and many 13/15 HP OHV Motors. Note: Valve may be coated or un-coated and... MSRP: Now: $31.99 View Details Compare Quick view NR RACING | sku: NR_VAL35-65-3465 Stainless Valve 35 mm x 6.5 mm 35mm face x 6.5mm stem x 3.465" Long. Stainless Steel. Requires Aluminum or Titanium retainers and split keepers. +.100 Longer than stock Used for GX390/Predator 420 Intake valve. Measure the existing valve before purchasing as they may be different... MSRP: Now: $31.99 View Details Compare Quick view NONE | sku: ARC_DJ-3282 DJ-3282 Wrist Pin Honda GX340/390 Stock wristpin for the Honda GX340/390 MSRP: Now: $10.50 Add to Cart Compare Quick view NONE | sku: ARC_DJ-3330S DJ-3330S GX390 Metal Exhaust Gasket GX390 Metal Exhaust Gasket MSRP: Now: $2.12 View Details Compare Quick view NONE | sku: ARC_6623-E ARC 6623-E Electric/Pull Start Billet Flywheel GX390 Predator 420 13-16HP Clone Engines Now available for electric or pull start! Our non-adjustable billet SFI Certified flywheel model for the Honda GX340 and GX390 engines is now both electric and pull start capable. The key way is fixed in the stock position of 24 degrees with a... MSRP: Now: $229.95 Add to Cart Compare Quick view Honda | sku: NR_12200-Z1C-406 Cylinder Head, GX390, UT1 (big port), Bare, Genuine Honda Head is finished but does not include Valves, Studs, springs, guide plates, seals, etc. For Honda GX390 and Predator 420 NON-HEMI MSRP: Now: $71.99 Add to Cart Compare Quick view sku: NR_90042-ZE8-000-CLONE Carb Stud 132mm GX390 predator 420 Aftermarket replacement carb stud for GX340/390, Predator 420, 13-16HP Clone engines 132 mm. end to end. Sold individually MSRP: Now: $3.99 Add to Cart Compare Quick view sku: NR_HEAD-13HP-CLONE-BARE Cylinder Head, Honda GX390 Bare Heads are finished and ready for assembly, but do not include Valves, Studs, springs, guide plates, seals, etc. Picture is for reference only MSRP: Now: $69.99 Add to Cart Compare Quick view sku: NR_390MUDMOTOREXH-LOOP Mud Boat Loop Header GX390 Predator 420 13-15HP Clone Header, Mud Motor & Boat, High-Performance Loop - GX270, GX390, & 420cc Predator High-Performance Loop Pipe for modified Mud MotorsExhaust designed to exit parallel with the output shaft. For Mud Boats. Fits GX390s, 420 Predators, and most... MSRP: Now: $93.99 View Details Compare Quick view sku: NR_390MUDMOTOREXH Mud Boat Header GX390 Predator 420 13-15HP Clone Exhaust System (Header), Mud Motor, Mud Skipper, & Long Shaft - GX270, GX390, & 420cc Predator Exhaust designed to exit parallel with the output shaft. For Mud Boats. Muffler IncludedFits GX240 to GX390, 13/15 hp Chinese OHVs, & 420 Predators MSRP: Now: $54.99 Add to Cart Compare Quick view sku: NR_420PISTONKIT 90mm Flat Top Piston, for 420 OHV & GX390 Engines 90mm Aftermarket Flat-top Piston for big bore GX390s. Fits stock bore on 420 Predators (non-hemi). GX390s Blocks can be bored to accept this piston407cc using stock crank,433 with +.160 Stroker Cranks,440cc with .200 CrankIncludes Piston & Rings (... MSRP: Now: $29.99 Add to Cart Compare Previous 1 2 3 4 5 6 7 8 9 10 11 Next Previous 1 2 3 4 5 6 7 8 9 10 11 Next Compare Selected × OK
Quick view Details sku: NR_390MUDMOTOREXH-LOOP Mud Boat Loop Header GX390 Predator 420 13-15HP Clone MSRP: Now: $93.99 View Details Compare Quick view Details sku: NR_390MUDMOTOREXH Mud Boat Header GX390 Predator 420 13-15HP Clone MSRP: Now: $54.99 Add to Cart Compare Quick view Details sku: NR_420PISTONKIT 90mm Flat Top Piston, for 420 OHV & GX390 Engines MSRP: Now: $29.99 Add to Cart Compare Quick view NR RACING | sku: NR_DLRET-390-ALUM Aluminum Retainer for 6.5 mm Valves Aluminum Retainer for use with split keepers. Use with HD/Dual Springs & SS Valves. 6.5mm Valve Stem RETAINERS ARE SOLD INDIVIDUALLY - 2 REQUIRED PER MOTOR KEEPERS ARE NOT INCLUDED - ORDER SEPARATE Use Keeper set part# NR_MD016483 MSRP: Now: $6.99 Add to Cart Compare Quick view NR RACING | sku: NR_VAL32-65-3465 Stainless Valve 31.5 mm x 6.5 mm 31.5mm face x 6.5mm stem x 3.465" Long. Stainless Steel. Requires Aluminum or Titanium retainers and split keepers. +.100 Longer than stock Used for GX390 Oversize Exhaust Valves and many 13/15 HP OHV Motors. Note: Valve may be coated or un-coated and... MSRP: Now: $31.99 View Details Compare Quick view NR RACING | sku: NR_VAL35-65-3465 Stainless Valve 35 mm x 6.5 mm 35mm face x 6.5mm stem x 3.465" Long. Stainless Steel. Requires Aluminum or Titanium retainers and split keepers. +.100 Longer than stock Used for GX390/Predator 420 Intake valve. Measure the existing valve before purchasing as they may be different... MSRP: Now: $31.99 View Details Compare Quick view NONE | sku: ARC_DJ-3282 DJ-3282 Wrist Pin Honda GX340/390 Stock wristpin for the Honda GX340/390 MSRP: Now: $10.50 Add to Cart Compare Quick view NONE | sku: ARC_DJ-3330S DJ-3330S GX390 Metal Exhaust Gasket GX390 Metal Exhaust Gasket MSRP: Now: $2.12 View Details Compare Quick view NONE | sku: ARC_6623-E ARC 6623-E Electric/Pull Start Billet Flywheel GX390 Predator 420 13-16HP Clone Engines Now available for electric or pull start! Our non-adjustable billet SFI Certified flywheel model for the Honda GX340 and GX390 engines is now both electric and pull start capable. The key way is fixed in the stock position of 24 degrees with a... MSRP: Now: $229.95 Add to Cart Compare Quick view Honda | sku: NR_12200-Z1C-406 Cylinder Head, GX390, UT1 (big port), Bare, Genuine Honda Head is finished but does not include Valves, Studs, springs, guide plates, seals, etc. For Honda GX390 and Predator 420 NON-HEMI MSRP: Now: $71.99 Add to Cart Compare Quick view sku: NR_90042-ZE8-000-CLONE Carb Stud 132mm GX390 predator 420 Aftermarket replacement carb stud for GX340/390, Predator 420, 13-16HP Clone engines 132 mm. end to end. Sold individually MSRP: Now: $3.99 Add to Cart Compare Quick view sku: NR_HEAD-13HP-CLONE-BARE Cylinder Head, Honda GX390 Bare Heads are finished and ready for assembly, but do not include Valves, Studs, springs, guide plates, seals, etc. Picture is for reference only MSRP: Now: $69.99 Add to Cart Compare Quick view sku: NR_390MUDMOTOREXH-LOOP Mud Boat Loop Header GX390 Predator 420 13-15HP Clone Header, Mud Motor & Boat, High-Performance Loop - GX270, GX390, & 420cc Predator High-Performance Loop Pipe for modified Mud MotorsExhaust designed to exit parallel with the output shaft. For Mud Boats. Fits GX390s, 420 Predators, and most... MSRP: Now: $93.99 View Details Compare Quick view sku: NR_390MUDMOTOREXH Mud Boat Header GX390 Predator 420 13-15HP Clone Exhaust System (Header), Mud Motor, Mud Skipper, & Long Shaft - GX270, GX390, & 420cc Predator Exhaust designed to exit parallel with the output shaft. For Mud Boats. Muffler IncludedFits GX240 to GX390, 13/15 hp Chinese OHVs, & 420 Predators MSRP: Now: $54.99 Add to Cart Compare Quick view sku: NR_420PISTONKIT 90mm Flat Top Piston, for 420 OHV & GX390 Engines 90mm Aftermarket Flat-top Piston for big bore GX390s. Fits stock bore on 420 Predators (non-hemi). GX390s Blocks can be bored to accept this piston407cc using stock crank,433 with +.160 Stroker Cranks,440cc with .200 CrankIncludes Piston & Rings (... MSRP: Now: $29.99 Add to Cart Compare Previous 1 2 3 4 5 6 7 8 9 10 11 Next Previous 1 2 3 4 5 6 7 8 9 10 11 Next Compare Selected × OK
Quick view Details sku: NR_390MUDMOTOREXH Mud Boat Header GX390 Predator 420 13-15HP Clone MSRP: Now: $54.99 Add to Cart Compare Quick view Details sku: NR_420PISTONKIT 90mm Flat Top Piston, for 420 OHV & GX390 Engines MSRP: Now: $29.99 Add to Cart Compare Quick view NR RACING | sku: NR_DLRET-390-ALUM Aluminum Retainer for 6.5 mm Valves Aluminum Retainer for use with split keepers. Use with HD/Dual Springs & SS Valves. 6.5mm Valve Stem RETAINERS ARE SOLD INDIVIDUALLY - 2 REQUIRED PER MOTOR KEEPERS ARE NOT INCLUDED - ORDER SEPARATE Use Keeper set part# NR_MD016483 MSRP: Now: $6.99 Add to Cart Compare Quick view NR RACING | sku: NR_VAL32-65-3465 Stainless Valve 31.5 mm x 6.5 mm 31.5mm face x 6.5mm stem x 3.465" Long. Stainless Steel. Requires Aluminum or Titanium retainers and split keepers. +.100 Longer than stock Used for GX390 Oversize Exhaust Valves and many 13/15 HP OHV Motors. Note: Valve may be coated or un-coated and... MSRP: Now: $31.99 View Details Compare Quick view NR RACING | sku: NR_VAL35-65-3465 Stainless Valve 35 mm x 6.5 mm 35mm face x 6.5mm stem x 3.465" Long. Stainless Steel. Requires Aluminum or Titanium retainers and split keepers. +.100 Longer than stock Used for GX390/Predator 420 Intake valve. Measure the existing valve before purchasing as they may be different... MSRP: Now: $31.99 View Details Compare Quick view NONE | sku: ARC_DJ-3282 DJ-3282 Wrist Pin Honda GX340/390 Stock wristpin for the Honda GX340/390 MSRP: Now: $10.50 Add to Cart Compare Quick view NONE | sku: ARC_DJ-3330S DJ-3330S GX390 Metal Exhaust Gasket GX390 Metal Exhaust Gasket MSRP: Now: $2.12 View Details Compare Quick view NONE | sku: ARC_6623-E ARC 6623-E Electric/Pull Start Billet Flywheel GX390 Predator 420 13-16HP Clone Engines Now available for electric or pull start! Our non-adjustable billet SFI Certified flywheel model for the Honda GX340 and GX390 engines is now both electric and pull start capable. The key way is fixed in the stock position of 24 degrees with a... MSRP: Now: $229.95 Add to Cart Compare Quick view Honda | sku: NR_12200-Z1C-406 Cylinder Head, GX390, UT1 (big port), Bare, Genuine Honda Head is finished but does not include Valves, Studs, springs, guide plates, seals, etc. For Honda GX390 and Predator 420 NON-HEMI MSRP: Now: $71.99 Add to Cart Compare Quick view sku: NR_90042-ZE8-000-CLONE Carb Stud 132mm GX390 predator 420 Aftermarket replacement carb stud for GX340/390, Predator 420, 13-16HP Clone engines 132 mm. end to end. Sold individually MSRP: Now: $3.99 Add to Cart Compare Quick view sku: NR_HEAD-13HP-CLONE-BARE Cylinder Head, Honda GX390 Bare Heads are finished and ready for assembly, but do not include Valves, Studs, springs, guide plates, seals, etc. Picture is for reference only MSRP: Now: $69.99 Add to Cart Compare Quick view sku: NR_390MUDMOTOREXH-LOOP Mud Boat Loop Header GX390 Predator 420 13-15HP Clone Header, Mud Motor & Boat, High-Performance Loop - GX270, GX390, & 420cc Predator High-Performance Loop Pipe for modified Mud MotorsExhaust designed to exit parallel with the output shaft. For Mud Boats. Fits GX390s, 420 Predators, and most... MSRP: Now: $93.99 View Details Compare Quick view sku: NR_390MUDMOTOREXH Mud Boat Header GX390 Predator 420 13-15HP Clone Exhaust System (Header), Mud Motor, Mud Skipper, & Long Shaft - GX270, GX390, & 420cc Predator Exhaust designed to exit parallel with the output shaft. For Mud Boats. Muffler IncludedFits GX240 to GX390, 13/15 hp Chinese OHVs, & 420 Predators MSRP: Now: $54.99 Add to Cart Compare Quick view sku: NR_420PISTONKIT 90mm Flat Top Piston, for 420 OHV & GX390 Engines 90mm Aftermarket Flat-top Piston for big bore GX390s. Fits stock bore on 420 Predators (non-hemi). GX390s Blocks can be bored to accept this piston407cc using stock crank,433 with +.160 Stroker Cranks,440cc with .200 CrankIncludes Piston & Rings (... MSRP: Now: $29.99 Add to Cart Compare Previous 1 2 3 4 5 6 7 8 9 10 11 Next Previous 1 2 3 4 5 6 7 8 9 10 11 Next Compare Selected × OK
Quick view Details sku: NR_420PISTONKIT 90mm Flat Top Piston, for 420 OHV & GX390 Engines MSRP: Now: $29.99 Add to Cart Compare Quick view NR RACING | sku: NR_DLRET-390-ALUM Aluminum Retainer for 6.5 mm Valves Aluminum Retainer for use with split keepers. Use with HD/Dual Springs & SS Valves. 6.5mm Valve Stem RETAINERS ARE SOLD INDIVIDUALLY - 2 REQUIRED PER MOTOR KEEPERS ARE NOT INCLUDED - ORDER SEPARATE Use Keeper set part# NR_MD016483 MSRP: Now: $6.99 Add to Cart Compare Quick view NR RACING | sku: NR_VAL32-65-3465 Stainless Valve 31.5 mm x 6.5 mm 31.5mm face x 6.5mm stem x 3.465" Long. Stainless Steel. Requires Aluminum or Titanium retainers and split keepers. +.100 Longer than stock Used for GX390 Oversize Exhaust Valves and many 13/15 HP OHV Motors. Note: Valve may be coated or un-coated and... MSRP: Now: $31.99 View Details Compare Quick view NR RACING | sku: NR_VAL35-65-3465 Stainless Valve 35 mm x 6.5 mm 35mm face x 6.5mm stem x 3.465" Long. Stainless Steel. Requires Aluminum or Titanium retainers and split keepers. +.100 Longer than stock Used for GX390/Predator 420 Intake valve. Measure the existing valve before purchasing as they may be different... MSRP: Now: $31.99 View Details Compare Quick view NONE | sku: ARC_DJ-3282 DJ-3282 Wrist Pin Honda GX340/390 Stock wristpin for the Honda GX340/390 MSRP: Now: $10.50 Add to Cart Compare Quick view NONE | sku: ARC_DJ-3330S DJ-3330S GX390 Metal Exhaust Gasket GX390 Metal Exhaust Gasket MSRP: Now: $2.12 View Details Compare Quick view NONE | sku: ARC_6623-E ARC 6623-E Electric/Pull Start Billet Flywheel GX390 Predator 420 13-16HP Clone Engines Now available for electric or pull start! Our non-adjustable billet SFI Certified flywheel model for the Honda GX340 and GX390 engines is now both electric and pull start capable. The key way is fixed in the stock position of 24 degrees with a... MSRP: Now: $229.95 Add to Cart Compare Quick view Honda | sku: NR_12200-Z1C-406 Cylinder Head, GX390, UT1 (big port), Bare, Genuine Honda Head is finished but does not include Valves, Studs, springs, guide plates, seals, etc. For Honda GX390 and Predator 420 NON-HEMI MSRP: Now: $71.99 Add to Cart Compare Quick view sku: NR_90042-ZE8-000-CLONE Carb Stud 132mm GX390 predator 420 Aftermarket replacement carb stud for GX340/390, Predator 420, 13-16HP Clone engines 132 mm. end to end. Sold individually MSRP: Now: $3.99 Add to Cart Compare Quick view sku: NR_HEAD-13HP-CLONE-BARE Cylinder Head, Honda GX390 Bare Heads are finished and ready for assembly, but do not include Valves, Studs, springs, guide plates, seals, etc. Picture is for reference only MSRP: Now: $69.99 Add to Cart Compare Quick view sku: NR_390MUDMOTOREXH-LOOP Mud Boat Loop Header GX390 Predator 420 13-15HP Clone Header, Mud Motor & Boat, High-Performance Loop - GX270, GX390, & 420cc Predator High-Performance Loop Pipe for modified Mud MotorsExhaust designed to exit parallel with the output shaft. For Mud Boats. Fits GX390s, 420 Predators, and most... MSRP: Now: $93.99 View Details Compare Quick view sku: NR_390MUDMOTOREXH Mud Boat Header GX390 Predator 420 13-15HP Clone Exhaust System (Header), Mud Motor, Mud Skipper, & Long Shaft - GX270, GX390, & 420cc Predator Exhaust designed to exit parallel with the output shaft. For Mud Boats. Muffler IncludedFits GX240 to GX390, 13/15 hp Chinese OHVs, & 420 Predators MSRP: Now: $54.99 Add to Cart Compare Quick view sku: NR_420PISTONKIT 90mm Flat Top Piston, for 420 OHV & GX390 Engines 90mm Aftermarket Flat-top Piston for big bore GX390s. Fits stock bore on 420 Predators (non-hemi). GX390s Blocks can be bored to accept this piston407cc using stock crank,433 with +.160 Stroker Cranks,440cc with .200 CrankIncludes Piston & Rings (... MSRP: Now: $29.99 Add to Cart Compare Previous 1 2 3 4 5 6 7 8 9 10 11 Next Previous 1 2 3 4 5 6 7 8 9 10 11 Next Compare Selected × OK
Quick view NR RACING | sku: NR_DLRET-390-ALUM Aluminum Retainer for 6.5 mm Valves Aluminum Retainer for use with split keepers. Use with HD/Dual Springs & SS Valves. 6.5mm Valve Stem RETAINERS ARE SOLD INDIVIDUALLY - 2 REQUIRED PER MOTOR KEEPERS ARE NOT INCLUDED - ORDER SEPARATE Use Keeper set part# NR_MD016483 MSRP: Now: $6.99 Add to Cart Compare Quick view NR RACING | sku: NR_VAL32-65-3465 Stainless Valve 31.5 mm x 6.5 mm 31.5mm face x 6.5mm stem x 3.465" Long. Stainless Steel. Requires Aluminum or Titanium retainers and split keepers. +.100 Longer than stock Used for GX390 Oversize Exhaust Valves and many 13/15 HP OHV Motors. Note: Valve may be coated or un-coated and... MSRP: Now: $31.99 View Details Compare Quick view NR RACING | sku: NR_VAL35-65-3465 Stainless Valve 35 mm x 6.5 mm 35mm face x 6.5mm stem x 3.465" Long. Stainless Steel. Requires Aluminum or Titanium retainers and split keepers. +.100 Longer than stock Used for GX390/Predator 420 Intake valve. Measure the existing valve before purchasing as they may be different... MSRP: Now: $31.99 View Details Compare Quick view NONE | sku: ARC_DJ-3282 DJ-3282 Wrist Pin Honda GX340/390 Stock wristpin for the Honda GX340/390 MSRP: Now: $10.50 Add to Cart Compare Quick view NONE | sku: ARC_DJ-3330S DJ-3330S GX390 Metal Exhaust Gasket GX390 Metal Exhaust Gasket MSRP: Now: $2.12 View Details Compare Quick view NONE | sku: ARC_6623-E ARC 6623-E Electric/Pull Start Billet Flywheel GX390 Predator 420 13-16HP Clone Engines Now available for electric or pull start! Our non-adjustable billet SFI Certified flywheel model for the Honda GX340 and GX390 engines is now both electric and pull start capable. The key way is fixed in the stock position of 24 degrees with a... MSRP: Now: $229.95 Add to Cart Compare Quick view Honda | sku: NR_12200-Z1C-406 Cylinder Head, GX390, UT1 (big port), Bare, Genuine Honda Head is finished but does not include Valves, Studs, springs, guide plates, seals, etc. For Honda GX390 and Predator 420 NON-HEMI MSRP: Now: $71.99 Add to Cart Compare Quick view sku: NR_90042-ZE8-000-CLONE Carb Stud 132mm GX390 predator 420 Aftermarket replacement carb stud for GX340/390, Predator 420, 13-16HP Clone engines 132 mm. end to end. Sold individually MSRP: Now: $3.99 Add to Cart Compare Quick view sku: NR_HEAD-13HP-CLONE-BARE Cylinder Head, Honda GX390 Bare Heads are finished and ready for assembly, but do not include Valves, Studs, springs, guide plates, seals, etc. Picture is for reference only MSRP: Now: $69.99 Add to Cart Compare Quick view sku: NR_390MUDMOTOREXH-LOOP Mud Boat Loop Header GX390 Predator 420 13-15HP Clone Header, Mud Motor & Boat, High-Performance Loop - GX270, GX390, & 420cc Predator High-Performance Loop Pipe for modified Mud MotorsExhaust designed to exit parallel with the output shaft. For Mud Boats. Fits GX390s, 420 Predators, and most... MSRP: Now: $93.99 View Details Compare Quick view sku: NR_390MUDMOTOREXH Mud Boat Header GX390 Predator 420 13-15HP Clone Exhaust System (Header), Mud Motor, Mud Skipper, & Long Shaft - GX270, GX390, & 420cc Predator Exhaust designed to exit parallel with the output shaft. For Mud Boats. Muffler IncludedFits GX240 to GX390, 13/15 hp Chinese OHVs, & 420 Predators MSRP: Now: $54.99 Add to Cart Compare Quick view sku: NR_420PISTONKIT 90mm Flat Top Piston, for 420 OHV & GX390 Engines 90mm Aftermarket Flat-top Piston for big bore GX390s. Fits stock bore on 420 Predators (non-hemi). GX390s Blocks can be bored to accept this piston407cc using stock crank,433 with +.160 Stroker Cranks,440cc with .200 CrankIncludes Piston & Rings (... MSRP: Now: $29.99 Add to Cart Compare Previous 1 2 3 4 5 6 7 8 9 10 11 Next Previous 1 2 3 4 5 6 7 8 9 10 11 Next Compare Selected × OK
Quick view NR RACING | sku: NR_VAL32-65-3465 Stainless Valve 31.5 mm x 6.5 mm 31.5mm face x 6.5mm stem x 3.465" Long. Stainless Steel. Requires Aluminum or Titanium retainers and split keepers. +.100 Longer than stock Used for GX390 Oversize Exhaust Valves and many 13/15 HP OHV Motors. Note: Valve may be coated or un-coated and... MSRP: Now: $31.99 View Details Compare Quick view NR RACING | sku: NR_VAL35-65-3465 Stainless Valve 35 mm x 6.5 mm 35mm face x 6.5mm stem x 3.465" Long. Stainless Steel. Requires Aluminum or Titanium retainers and split keepers. +.100 Longer than stock Used for GX390/Predator 420 Intake valve. Measure the existing valve before purchasing as they may be different... MSRP: Now: $31.99 View Details Compare Quick view NONE | sku: ARC_DJ-3282 DJ-3282 Wrist Pin Honda GX340/390 Stock wristpin for the Honda GX340/390 MSRP: Now: $10.50 Add to Cart Compare Quick view NONE | sku: ARC_DJ-3330S DJ-3330S GX390 Metal Exhaust Gasket GX390 Metal Exhaust Gasket MSRP: Now: $2.12 View Details Compare Quick view NONE | sku: ARC_6623-E ARC 6623-E Electric/Pull Start Billet Flywheel GX390 Predator 420 13-16HP Clone Engines Now available for electric or pull start! Our non-adjustable billet SFI Certified flywheel model for the Honda GX340 and GX390 engines is now both electric and pull start capable. The key way is fixed in the stock position of 24 degrees with a... MSRP: Now: $229.95 Add to Cart Compare Quick view Honda | sku: NR_12200-Z1C-406 Cylinder Head, GX390, UT1 (big port), Bare, Genuine Honda Head is finished but does not include Valves, Studs, springs, guide plates, seals, etc. For Honda GX390 and Predator 420 NON-HEMI MSRP: Now: $71.99 Add to Cart Compare Quick view sku: NR_90042-ZE8-000-CLONE Carb Stud 132mm GX390 predator 420 Aftermarket replacement carb stud for GX340/390, Predator 420, 13-16HP Clone engines 132 mm. end to end. Sold individually MSRP: Now: $3.99 Add to Cart Compare Quick view sku: NR_HEAD-13HP-CLONE-BARE Cylinder Head, Honda GX390 Bare Heads are finished and ready for assembly, but do not include Valves, Studs, springs, guide plates, seals, etc. Picture is for reference only MSRP: Now: $69.99 Add to Cart Compare Quick view sku: NR_390MUDMOTOREXH-LOOP Mud Boat Loop Header GX390 Predator 420 13-15HP Clone Header, Mud Motor & Boat, High-Performance Loop - GX270, GX390, & 420cc Predator High-Performance Loop Pipe for modified Mud MotorsExhaust designed to exit parallel with the output shaft. For Mud Boats. Fits GX390s, 420 Predators, and most... MSRP: Now: $93.99 View Details Compare Quick view sku: NR_390MUDMOTOREXH Mud Boat Header GX390 Predator 420 13-15HP Clone Exhaust System (Header), Mud Motor, Mud Skipper, & Long Shaft - GX270, GX390, & 420cc Predator Exhaust designed to exit parallel with the output shaft. For Mud Boats. Muffler IncludedFits GX240 to GX390, 13/15 hp Chinese OHVs, & 420 Predators MSRP: Now: $54.99 Add to Cart Compare Quick view sku: NR_420PISTONKIT 90mm Flat Top Piston, for 420 OHV & GX390 Engines 90mm Aftermarket Flat-top Piston for big bore GX390s. Fits stock bore on 420 Predators (non-hemi). GX390s Blocks can be bored to accept this piston407cc using stock crank,433 with +.160 Stroker Cranks,440cc with .200 CrankIncludes Piston & Rings (... MSRP: Now: $29.99 Add to Cart Compare Previous 1 2 3 4 5 6 7 8 9 10 11 Next Previous 1 2 3 4 5 6 7 8 9 10 11 Next Compare Selected × OK
Quick view NR RACING | sku: NR_VAL35-65-3465 Stainless Valve 35 mm x 6.5 mm 35mm face x 6.5mm stem x 3.465" Long. Stainless Steel. Requires Aluminum or Titanium retainers and split keepers. +.100 Longer than stock Used for GX390/Predator 420 Intake valve. Measure the existing valve before purchasing as they may be different... MSRP: Now: $31.99 View Details Compare Quick view NONE | sku: ARC_DJ-3282 DJ-3282 Wrist Pin Honda GX340/390 Stock wristpin for the Honda GX340/390 MSRP: Now: $10.50 Add to Cart Compare Quick view NONE | sku: ARC_DJ-3330S DJ-3330S GX390 Metal Exhaust Gasket GX390 Metal Exhaust Gasket MSRP: Now: $2.12 View Details Compare Quick view NONE | sku: ARC_6623-E ARC 6623-E Electric/Pull Start Billet Flywheel GX390 Predator 420 13-16HP Clone Engines Now available for electric or pull start! Our non-adjustable billet SFI Certified flywheel model for the Honda GX340 and GX390 engines is now both electric and pull start capable. The key way is fixed in the stock position of 24 degrees with a... MSRP: Now: $229.95 Add to Cart Compare Quick view Honda | sku: NR_12200-Z1C-406 Cylinder Head, GX390, UT1 (big port), Bare, Genuine Honda Head is finished but does not include Valves, Studs, springs, guide plates, seals, etc. For Honda GX390 and Predator 420 NON-HEMI MSRP: Now: $71.99 Add to Cart Compare Quick view sku: NR_90042-ZE8-000-CLONE Carb Stud 132mm GX390 predator 420 Aftermarket replacement carb stud for GX340/390, Predator 420, 13-16HP Clone engines 132 mm. end to end. Sold individually MSRP: Now: $3.99 Add to Cart Compare Quick view sku: NR_HEAD-13HP-CLONE-BARE Cylinder Head, Honda GX390 Bare Heads are finished and ready for assembly, but do not include Valves, Studs, springs, guide plates, seals, etc. Picture is for reference only MSRP: Now: $69.99 Add to Cart Compare Quick view sku: NR_390MUDMOTOREXH-LOOP Mud Boat Loop Header GX390 Predator 420 13-15HP Clone Header, Mud Motor & Boat, High-Performance Loop - GX270, GX390, & 420cc Predator High-Performance Loop Pipe for modified Mud MotorsExhaust designed to exit parallel with the output shaft. For Mud Boats. Fits GX390s, 420 Predators, and most... MSRP: Now: $93.99 View Details Compare Quick view sku: NR_390MUDMOTOREXH Mud Boat Header GX390 Predator 420 13-15HP Clone Exhaust System (Header), Mud Motor, Mud Skipper, & Long Shaft - GX270, GX390, & 420cc Predator Exhaust designed to exit parallel with the output shaft. For Mud Boats. Muffler IncludedFits GX240 to GX390, 13/15 hp Chinese OHVs, & 420 Predators MSRP: Now: $54.99 Add to Cart Compare Quick view sku: NR_420PISTONKIT 90mm Flat Top Piston, for 420 OHV & GX390 Engines 90mm Aftermarket Flat-top Piston for big bore GX390s. Fits stock bore on 420 Predators (non-hemi). GX390s Blocks can be bored to accept this piston407cc using stock crank,433 with +.160 Stroker Cranks,440cc with .200 CrankIncludes Piston & Rings (... MSRP: Now: $29.99 Add to Cart Compare Previous 1 2 3 4 5 6 7 8 9 10 11 Next Previous 1 2 3 4 5 6 7 8 9 10 11 Next Compare Selected × OK
Quick view NONE | sku: ARC_DJ-3282 DJ-3282 Wrist Pin Honda GX340/390 Stock wristpin for the Honda GX340/390 MSRP: Now: $10.50 Add to Cart Compare Quick view NONE | sku: ARC_DJ-3330S DJ-3330S GX390 Metal Exhaust Gasket GX390 Metal Exhaust Gasket MSRP: Now: $2.12 View Details Compare Quick view NONE | sku: ARC_6623-E ARC 6623-E Electric/Pull Start Billet Flywheel GX390 Predator 420 13-16HP Clone Engines Now available for electric or pull start! Our non-adjustable billet SFI Certified flywheel model for the Honda GX340 and GX390 engines is now both electric and pull start capable. The key way is fixed in the stock position of 24 degrees with a... MSRP: Now: $229.95 Add to Cart Compare Quick view Honda | sku: NR_12200-Z1C-406 Cylinder Head, GX390, UT1 (big port), Bare, Genuine Honda Head is finished but does not include Valves, Studs, springs, guide plates, seals, etc. For Honda GX390 and Predator 420 NON-HEMI MSRP: Now: $71.99 Add to Cart Compare Quick view sku: NR_90042-ZE8-000-CLONE Carb Stud 132mm GX390 predator 420 Aftermarket replacement carb stud for GX340/390, Predator 420, 13-16HP Clone engines 132 mm. end to end. Sold individually MSRP: Now: $3.99 Add to Cart Compare Quick view sku: NR_HEAD-13HP-CLONE-BARE Cylinder Head, Honda GX390 Bare Heads are finished and ready for assembly, but do not include Valves, Studs, springs, guide plates, seals, etc. Picture is for reference only MSRP: Now: $69.99 Add to Cart Compare Quick view sku: NR_390MUDMOTOREXH-LOOP Mud Boat Loop Header GX390 Predator 420 13-15HP Clone Header, Mud Motor & Boat, High-Performance Loop - GX270, GX390, & 420cc Predator High-Performance Loop Pipe for modified Mud MotorsExhaust designed to exit parallel with the output shaft. For Mud Boats. Fits GX390s, 420 Predators, and most... MSRP: Now: $93.99 View Details Compare Quick view sku: NR_390MUDMOTOREXH Mud Boat Header GX390 Predator 420 13-15HP Clone Exhaust System (Header), Mud Motor, Mud Skipper, & Long Shaft - GX270, GX390, & 420cc Predator Exhaust designed to exit parallel with the output shaft. For Mud Boats. Muffler IncludedFits GX240 to GX390, 13/15 hp Chinese OHVs, & 420 Predators MSRP: Now: $54.99 Add to Cart Compare Quick view sku: NR_420PISTONKIT 90mm Flat Top Piston, for 420 OHV & GX390 Engines 90mm Aftermarket Flat-top Piston for big bore GX390s. Fits stock bore on 420 Predators (non-hemi). GX390s Blocks can be bored to accept this piston407cc using stock crank,433 with +.160 Stroker Cranks,440cc with .200 CrankIncludes Piston & Rings (... MSRP: Now: $29.99 Add to Cart Compare Previous 1 2 3 4 5 6 7 8 9 10 11 Next Previous 1 2 3 4 5 6 7 8 9 10 11 Next Compare Selected × OK
Quick view NONE | sku: ARC_DJ-3330S DJ-3330S GX390 Metal Exhaust Gasket GX390 Metal Exhaust Gasket MSRP: Now: $2.12 View Details Compare Quick view NONE | sku: ARC_6623-E ARC 6623-E Electric/Pull Start Billet Flywheel GX390 Predator 420 13-16HP Clone Engines Now available for electric or pull start! Our non-adjustable billet SFI Certified flywheel model for the Honda GX340 and GX390 engines is now both electric and pull start capable. The key way is fixed in the stock position of 24 degrees with a... MSRP: Now: $229.95 Add to Cart Compare Quick view Honda | sku: NR_12200-Z1C-406 Cylinder Head, GX390, UT1 (big port), Bare, Genuine Honda Head is finished but does not include Valves, Studs, springs, guide plates, seals, etc. For Honda GX390 and Predator 420 NON-HEMI MSRP: Now: $71.99 Add to Cart Compare Quick view sku: NR_90042-ZE8-000-CLONE Carb Stud 132mm GX390 predator 420 Aftermarket replacement carb stud for GX340/390, Predator 420, 13-16HP Clone engines 132 mm. end to end. Sold individually MSRP: Now: $3.99 Add to Cart Compare Quick view sku: NR_HEAD-13HP-CLONE-BARE Cylinder Head, Honda GX390 Bare Heads are finished and ready for assembly, but do not include Valves, Studs, springs, guide plates, seals, etc. Picture is for reference only MSRP: Now: $69.99 Add to Cart Compare Quick view sku: NR_390MUDMOTOREXH-LOOP Mud Boat Loop Header GX390 Predator 420 13-15HP Clone Header, Mud Motor & Boat, High-Performance Loop - GX270, GX390, & 420cc Predator High-Performance Loop Pipe for modified Mud MotorsExhaust designed to exit parallel with the output shaft. For Mud Boats. Fits GX390s, 420 Predators, and most... MSRP: Now: $93.99 View Details Compare Quick view sku: NR_390MUDMOTOREXH Mud Boat Header GX390 Predator 420 13-15HP Clone Exhaust System (Header), Mud Motor, Mud Skipper, & Long Shaft - GX270, GX390, & 420cc Predator Exhaust designed to exit parallel with the output shaft. For Mud Boats. Muffler IncludedFits GX240 to GX390, 13/15 hp Chinese OHVs, & 420 Predators MSRP: Now: $54.99 Add to Cart Compare Quick view sku: NR_420PISTONKIT 90mm Flat Top Piston, for 420 OHV & GX390 Engines 90mm Aftermarket Flat-top Piston for big bore GX390s. Fits stock bore on 420 Predators (non-hemi). GX390s Blocks can be bored to accept this piston407cc using stock crank,433 with +.160 Stroker Cranks,440cc with .200 CrankIncludes Piston & Rings (... MSRP: Now: $29.99 Add to Cart Compare Previous 1 2 3 4 5 6 7 8 9 10 11 Next Previous 1 2 3 4 5 6 7 8 9 10 11 Next Compare Selected × OK
Quick view NONE | sku: ARC_6623-E ARC 6623-E Electric/Pull Start Billet Flywheel GX390 Predator 420 13-16HP Clone Engines Now available for electric or pull start! Our non-adjustable billet SFI Certified flywheel model for the Honda GX340 and GX390 engines is now both electric and pull start capable. The key way is fixed in the stock position of 24 degrees with a... MSRP: Now: $229.95 Add to Cart Compare Quick view Honda | sku: NR_12200-Z1C-406 Cylinder Head, GX390, UT1 (big port), Bare, Genuine Honda Head is finished but does not include Valves, Studs, springs, guide plates, seals, etc. For Honda GX390 and Predator 420 NON-HEMI MSRP: Now: $71.99 Add to Cart Compare Quick view sku: NR_90042-ZE8-000-CLONE Carb Stud 132mm GX390 predator 420 Aftermarket replacement carb stud for GX340/390, Predator 420, 13-16HP Clone engines 132 mm. end to end. Sold individually MSRP: Now: $3.99 Add to Cart Compare Quick view sku: NR_HEAD-13HP-CLONE-BARE Cylinder Head, Honda GX390 Bare Heads are finished and ready for assembly, but do not include Valves, Studs, springs, guide plates, seals, etc. Picture is for reference only MSRP: Now: $69.99 Add to Cart Compare Quick view sku: NR_390MUDMOTOREXH-LOOP Mud Boat Loop Header GX390 Predator 420 13-15HP Clone Header, Mud Motor & Boat, High-Performance Loop - GX270, GX390, & 420cc Predator High-Performance Loop Pipe for modified Mud MotorsExhaust designed to exit parallel with the output shaft. For Mud Boats. Fits GX390s, 420 Predators, and most... MSRP: Now: $93.99 View Details Compare Quick view sku: NR_390MUDMOTOREXH Mud Boat Header GX390 Predator 420 13-15HP Clone Exhaust System (Header), Mud Motor, Mud Skipper, & Long Shaft - GX270, GX390, & 420cc Predator Exhaust designed to exit parallel with the output shaft. For Mud Boats. Muffler IncludedFits GX240 to GX390, 13/15 hp Chinese OHVs, & 420 Predators MSRP: Now: $54.99 Add to Cart Compare Quick view sku: NR_420PISTONKIT 90mm Flat Top Piston, for 420 OHV & GX390 Engines 90mm Aftermarket Flat-top Piston for big bore GX390s. Fits stock bore on 420 Predators (non-hemi). GX390s Blocks can be bored to accept this piston407cc using stock crank,433 with +.160 Stroker Cranks,440cc with .200 CrankIncludes Piston & Rings (... MSRP: Now: $29.99 Add to Cart Compare Previous 1 2 3 4 5 6 7 8 9 10 11 Next Previous 1 2 3 4 5 6 7 8 9 10 11 Next Compare Selected × OK
Quick view Honda | sku: NR_12200-Z1C-406 Cylinder Head, GX390, UT1 (big port), Bare, Genuine Honda Head is finished but does not include Valves, Studs, springs, guide plates, seals, etc. For Honda GX390 and Predator 420 NON-HEMI MSRP: Now: $71.99 Add to Cart Compare Quick view sku: NR_90042-ZE8-000-CLONE Carb Stud 132mm GX390 predator 420 Aftermarket replacement carb stud for GX340/390, Predator 420, 13-16HP Clone engines 132 mm. end to end. Sold individually MSRP: Now: $3.99 Add to Cart Compare Quick view sku: NR_HEAD-13HP-CLONE-BARE Cylinder Head, Honda GX390 Bare Heads are finished and ready for assembly, but do not include Valves, Studs, springs, guide plates, seals, etc. Picture is for reference only MSRP: Now: $69.99 Add to Cart Compare Quick view sku: NR_390MUDMOTOREXH-LOOP Mud Boat Loop Header GX390 Predator 420 13-15HP Clone Header, Mud Motor & Boat, High-Performance Loop - GX270, GX390, & 420cc Predator High-Performance Loop Pipe for modified Mud MotorsExhaust designed to exit parallel with the output shaft. For Mud Boats. Fits GX390s, 420 Predators, and most... MSRP: Now: $93.99 View Details Compare Quick view sku: NR_390MUDMOTOREXH Mud Boat Header GX390 Predator 420 13-15HP Clone Exhaust System (Header), Mud Motor, Mud Skipper, & Long Shaft - GX270, GX390, & 420cc Predator Exhaust designed to exit parallel with the output shaft. For Mud Boats. Muffler IncludedFits GX240 to GX390, 13/15 hp Chinese OHVs, & 420 Predators MSRP: Now: $54.99 Add to Cart Compare Quick view sku: NR_420PISTONKIT 90mm Flat Top Piston, for 420 OHV & GX390 Engines 90mm Aftermarket Flat-top Piston for big bore GX390s. Fits stock bore on 420 Predators (non-hemi). GX390s Blocks can be bored to accept this piston407cc using stock crank,433 with +.160 Stroker Cranks,440cc with .200 CrankIncludes Piston & Rings (... MSRP: Now: $29.99 Add to Cart Compare Previous 1 2 3 4 5 6 7 8 9 10 11 Next Previous 1 2 3 4 5 6 7 8 9 10 11 Next Compare Selected × OK
Quick view sku: NR_90042-ZE8-000-CLONE Carb Stud 132mm GX390 predator 420 Aftermarket replacement carb stud for GX340/390, Predator 420, 13-16HP Clone engines 132 mm. end to end. Sold individually MSRP: Now: $3.99 Add to Cart Compare Quick view sku: NR_HEAD-13HP-CLONE-BARE Cylinder Head, Honda GX390 Bare Heads are finished and ready for assembly, but do not include Valves, Studs, springs, guide plates, seals, etc. Picture is for reference only MSRP: Now: $69.99 Add to Cart Compare Quick view sku: NR_390MUDMOTOREXH-LOOP Mud Boat Loop Header GX390 Predator 420 13-15HP Clone Header, Mud Motor & Boat, High-Performance Loop - GX270, GX390, & 420cc Predator High-Performance Loop Pipe for modified Mud MotorsExhaust designed to exit parallel with the output shaft. For Mud Boats. Fits GX390s, 420 Predators, and most... MSRP: Now: $93.99 View Details Compare Quick view sku: NR_390MUDMOTOREXH Mud Boat Header GX390 Predator 420 13-15HP Clone Exhaust System (Header), Mud Motor, Mud Skipper, & Long Shaft - GX270, GX390, & 420cc Predator Exhaust designed to exit parallel with the output shaft. For Mud Boats. Muffler IncludedFits GX240 to GX390, 13/15 hp Chinese OHVs, & 420 Predators MSRP: Now: $54.99 Add to Cart Compare Quick view sku: NR_420PISTONKIT 90mm Flat Top Piston, for 420 OHV & GX390 Engines 90mm Aftermarket Flat-top Piston for big bore GX390s. Fits stock bore on 420 Predators (non-hemi). GX390s Blocks can be bored to accept this piston407cc using stock crank,433 with +.160 Stroker Cranks,440cc with .200 CrankIncludes Piston & Rings (... MSRP: Now: $29.99 Add to Cart Compare Previous 1 2 3 4 5 6 7 8 9 10 11 Next Previous 1 2 3 4 5 6 7 8 9 10 11 Next Compare Selected × OK
Quick view sku: NR_HEAD-13HP-CLONE-BARE Cylinder Head, Honda GX390 Bare Heads are finished and ready for assembly, but do not include Valves, Studs, springs, guide plates, seals, etc. Picture is for reference only MSRP: Now: $69.99 Add to Cart Compare Quick view sku: NR_390MUDMOTOREXH-LOOP Mud Boat Loop Header GX390 Predator 420 13-15HP Clone Header, Mud Motor & Boat, High-Performance Loop - GX270, GX390, & 420cc Predator High-Performance Loop Pipe for modified Mud MotorsExhaust designed to exit parallel with the output shaft. For Mud Boats. Fits GX390s, 420 Predators, and most... MSRP: Now: $93.99 View Details Compare Quick view sku: NR_390MUDMOTOREXH Mud Boat Header GX390 Predator 420 13-15HP Clone Exhaust System (Header), Mud Motor, Mud Skipper, & Long Shaft - GX270, GX390, & 420cc Predator Exhaust designed to exit parallel with the output shaft. For Mud Boats. Muffler IncludedFits GX240 to GX390, 13/15 hp Chinese OHVs, & 420 Predators MSRP: Now: $54.99 Add to Cart Compare Quick view sku: NR_420PISTONKIT 90mm Flat Top Piston, for 420 OHV & GX390 Engines 90mm Aftermarket Flat-top Piston for big bore GX390s. Fits stock bore on 420 Predators (non-hemi). GX390s Blocks can be bored to accept this piston407cc using stock crank,433 with +.160 Stroker Cranks,440cc with .200 CrankIncludes Piston & Rings (... MSRP: Now: $29.99 Add to Cart Compare Previous 1 2 3 4 5 6 7 8 9 10 11 Next Previous 1 2 3 4 5 6 7 8 9 10 11 Next Compare Selected × OK
Quick view sku: NR_390MUDMOTOREXH-LOOP Mud Boat Loop Header GX390 Predator 420 13-15HP Clone Header, Mud Motor & Boat, High-Performance Loop - GX270, GX390, & 420cc Predator High-Performance Loop Pipe for modified Mud MotorsExhaust designed to exit parallel with the output shaft. For Mud Boats. Fits GX390s, 420 Predators, and most... MSRP: Now: $93.99 View Details Compare Quick view sku: NR_390MUDMOTOREXH Mud Boat Header GX390 Predator 420 13-15HP Clone Exhaust System (Header), Mud Motor, Mud Skipper, & Long Shaft - GX270, GX390, & 420cc Predator Exhaust designed to exit parallel with the output shaft. For Mud Boats. Muffler IncludedFits GX240 to GX390, 13/15 hp Chinese OHVs, & 420 Predators MSRP: Now: $54.99 Add to Cart Compare Quick view sku: NR_420PISTONKIT 90mm Flat Top Piston, for 420 OHV & GX390 Engines 90mm Aftermarket Flat-top Piston for big bore GX390s. Fits stock bore on 420 Predators (non-hemi). GX390s Blocks can be bored to accept this piston407cc using stock crank,433 with +.160 Stroker Cranks,440cc with .200 CrankIncludes Piston & Rings (... MSRP: Now: $29.99 Add to Cart Compare Previous 1 2 3 4 5 6 7 8 9 10 11 Next Previous 1 2 3 4 5 6 7 8 9 10 11 Next Compare Selected × OK
Quick view sku: NR_390MUDMOTOREXH Mud Boat Header GX390 Predator 420 13-15HP Clone Exhaust System (Header), Mud Motor, Mud Skipper, & Long Shaft - GX270, GX390, & 420cc Predator Exhaust designed to exit parallel with the output shaft. For Mud Boats. Muffler IncludedFits GX240 to GX390, 13/15 hp Chinese OHVs, & 420 Predators MSRP: Now: $54.99 Add to Cart Compare Quick view sku: NR_420PISTONKIT 90mm Flat Top Piston, for 420 OHV & GX390 Engines 90mm Aftermarket Flat-top Piston for big bore GX390s. Fits stock bore on 420 Predators (non-hemi). GX390s Blocks can be bored to accept this piston407cc using stock crank,433 with +.160 Stroker Cranks,440cc with .200 CrankIncludes Piston & Rings (... MSRP: Now: $29.99 Add to Cart Compare Previous 1 2 3 4 5 6 7 8 9 10 11 Next Previous 1 2 3 4 5 6 7 8 9 10 11 Next Compare Selected
Quick view sku: NR_420PISTONKIT 90mm Flat Top Piston, for 420 OHV & GX390 Engines 90mm Aftermarket Flat-top Piston for big bore GX390s. Fits stock bore on 420 Predators (non-hemi). GX390s Blocks can be bored to accept this piston407cc using stock crank,433 with +.160 Stroker Cranks,440cc with .200 CrankIncludes Piston & Rings (... MSRP: Now: $29.99 Add to Cart Compare Previous 1 2 3 4 5 6 7 8 9 10 11 Next Previous 1 2 3 4 5 6 7 8 9 10 11 Next Compare Selected