Dirt Bike Engine
5140 parts
Pistons, top-end kits, gaskets, cylinders, valves, bearings and seals from Vertex, ProX, Wossner, Athena, Cometic, WSM, Boyesen and Moose Offroad. Everything you need for a fresh top end, a full rebuild or a little more power. Shop all dirt bike parts.
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Moose Offroad - Exhaust Gasket Kit - Honda/Yamaha
Moose Offroad
MSRP: $9.80$9.68Moose Offroad - 09345272 - Exhaust Gasket Kit - Honda/YamahaFeatures2-stroke kit includes O-rings, springs, washer and gasket (where applicable)4-stroke kit contains header gasketSpecsMSRP: $9.80$9.68 -
Moose Offroad - Exhaust Gasket Kit - Honda/Kawasaki/Yamaha - Multiple Honda/Kawasaki/Yamaha Models
Moose Offroad
MSRP: $8.21$8.13Moose Offroad - 09345278 - Exhaust Gasket Kit - Honda/Kawasaki/YamahaFeatures2-stroke kit includes O-rings, springs, washer and gasket (where applicable)4-stroke kit contains header gasketSpecsMSRP: $8.21$8.13 -
Moose Offroad - Piston Kit - 66.00 mm - Fits 2007-2018 Honda CRF150R 13:1 (Designed for aftermarket flat valves)
Moose Offroad
$326.95Moose Offroad - 09106468 - Piston Kit - 66.00 mm - HondaFeaturesFull radius dome designs maximize quench while eliminating hot spots that promote detonationInternal bracing maximizes durability while...$326.95 -
Moose Offroad - Piston Kit - 97.00 mm -Yamaha - Fits 2020-2022 Yamaha YZ450F 13.5.1
Moose Offroad
$386.95Moose Offroad - 09106520 - Piston Kit - 97.00 mm -YamahaFeaturesFull radius dome designs maximize quench while eliminating hot spots that promote detonationInternal bracing maximizes durability while...$386.95 -
Moose Offroad - Piston Kit - 95.00 mm - Husqvarna - Fits 2016-2022 Husqvarna FC 450 13.5:1 Pro Race Piston, 2016-2024 KTM 450 SX-F 13.5:1 Pro Race Piston
Moose Offroad
$471.95Moose Offroad - 09106500 - Piston Kit - 95.00 mm - HusqvarnaFeaturesFull radius dome designs maximize quench while eliminating hot spots that promote detonationInternal bracing maximizes durability...$471.95 -
Moose Offroad - Piston Kit - 78.00 mm - Fits 2004-2008 Honda CRF250R 13.5:1
Moose Offroad
$326.95Moose Offroad - 09106465 - Piston Kit - 78.00 mm - HondaFeaturesFull radius dome designs maximize quench while eliminating hot spots that promote detonationInternal bracing maximizes durability while...$326.95 -
Moose Offroad - Case Saver - Fits 2017-2018 Honda CRF450R
Moose Offroad
$27.95Moose Offroad - 09500890 - Case Saver - HondaFeaturesBetter looking and more sturdy than OEM plastic guardsEngraved logoMounting hardware includedMade in the U.S.A.Specs$27.95 -
Moose Offroad - Valve Cover Gasket - Kawasaki
Moose Offroad
$21.00Moose Offroad - 09346175 - Valve Cover Gasket - KawasakiFeaturesMade in the USASpecsMaterialRubber$21.00 -
Moose Offroad - Cylinder - 66.40 mm - Fits 1999-2023 Yamaha YZ250
Moose Offroad
$597.95Moose Offroad - 09311074 - Cylinder - 66.40 mm - YamahaFeaturesExtremely durable low-friction bore surface allows for greater heat dissipationMade from cast aluminum; nickel silicon carbide...$597.95 -
Moose Offroad - Complete Gasket Set - Kawasaki KLX & More
Moose Offroad
$92.81Moose Offroad - 09346888 - Complete Gasket Set - KawasakiFeaturesHigh-tech materials provide unmatched reliability and performanceSet includes all gaskets and O-rings necessary to rebuild the entire...$92.81 -
Moose Offroad - Valve Seal Kit - Honda CRF250R/CRF250RX - Fits 2018-2026 Honda CRF250R/RX
Moose Offroad
$15.95Moose Offroad - 09263375 - Valve Seal Kit - Honda CRF250R/CRF250RXFeaturesHigh-temperature Viton® and PTFE materialsImproved tolerance over OEM100% quality controlledKit includes one full set of...$15.95 -
Moose Offroad - Valve and Spring Kit - Kawasaki KX250X | KX250F - Fits Kawasaki 2020-2023 KX250, 2020-2022 KX250
Moose Offroad
$196.95Moose Offroad - 09263371 - Valve and Spring Kit - Kawasaki KX250X | KX250FFeaturesExtend the life of the valve train and intake components by as much as 4x over the OEM titanium partsValves are...$196.95 -
Moose Offroad - Valve Seal Kit - Kawaski KX250F - Fits 2020-2026 Kawasaki KX250
Moose Offroad
$15.95Moose Offroad - 09263376 - Valve Seal Kit - Kawaski KX250FFeaturesHigh-temperature Viton® and PTFE materialsImproved tolerance over OEM100% quality controlledKit includes one full set of intake and...$15.95 -
Moose Offroad - Cam Chain - 98XRH2010 x 114 Links
Moose Offroad
$42.00Moose Offroad - 09251440 - Cam Chain - 98XRH2010 x 114 LinksFeaturesLightweight and great durabilityFeatures precision solid bushings and shot-peened, providing maximum strengthMade to meet or exceed...$42.00 -
Moose Offroad - Cam Chain - 98XRH2010 x 122 Links
Moose Offroad
$59.07Moose Offroad - 09251435 - Cam Chain - 98XRH2010 x 122 LinksFeaturesLightweight and great durabilityFeatures precision solid bushings and shot-peened, providing maximum strengthMade to meet or exceed...$59.07 -
Moose Offroad - Cam Chain - 92RH2015 x 174 Links
Moose Offroad
$88.95Moose Offroad - 09251436 - Cam Chain - 92RH2015 x 174 LinksFeaturesLightweight and great durabilityFeatures precision solid bushings and shot-peened, providing maximum strengthMade to meet or exceed...$88.95 -
Moose Offroad - Snap Ring - 10 Pack - Gas Gas/Husqvarna/KTM - Multiple Gas Gas/Husqvarna/KTM Models
Moose Offroad
$28.95Moose Offroad - 09350494 - Snap Ring - 10 Pack - Gas Gas/Husqvarna/KTMFeaturesIndividually wrapped washer kit sold in a 10-pack unitReplacement Part for OEM Number(s):49033091000Specs$28.95 -
Moose Offroad - Complete Gasket Set - Fits 2019-2022 Honda CRF250F
Moose Offroad
$142.52Moose Offroad - 09347463 - Complete Gasket Set - HondaFeaturesHigh-tech materials provide unmatched reliability and performanceRebuild the engine and transmission with total confidence as each set is...$142.52 -
Moose Offroad - Motor Oil Seals - Kawasaki
Moose Offroad
$35.81Moose Offroad - 09350400 - Motor Oil Seals - KawasakiFeaturesHigh-tech materials provide unmatched reliability and performanceRebuild the engine and transmission with total confidence as each set is...$35.81 -
Moose Offroad - Clutch Cover - Fits 2017-2020 Kawasaki KX250F
Moose Offroad
$152.95Moose Offroad - 09401857 - Clutch Cover - KawasakiFeaturesStronger than OEM coverDissipates heat better than OEM coverHard-coated finish for long-lasting durabilityReplacement Part for OEM...$152.95 -
Moose Offroad - Seals and O-Ring Kit - Gas Gas/ Husqvarna/KTM - Multiple Gas Gas/Husqvarna/KTM Models
Moose Offroad
$47.13Moose Offroad - 09351265 - Seals and O-Ring Kit - Gas Gas/ Husqvarna/KTMFeaturesSpecsRiding StyleOff-Road$47.13
Moose Offroad - Oil Seal Set - Kawasaki
Moose Offroad
$55.32Moose Offroad - 09351264 - Oil Seal Set - KawasakiFeaturesValve seals also includedIncludes formed rubber valve cover gasketsMade in the USADoes not include mechanical water pump seal.Specs$55.32
Moose Offroad - Oil Seal Set - Honda
Moose Offroad
$11.52Moose Offroad - 09351263 - Oil Seal Set - HondaFeaturesValve seals also includedIncludes formed rubber valve cover gasketsMade in the USADoes not include mechanical water pump seal.Specs$11.52
Moose Offroad - Head Cover Gasket - Fits Honda 2004-2007 CRF250R, 2008-2009 CRF250R
Moose Offroad
$19.21Moose Offroad - 09341462 - Head Cover Gasket - HondaFeaturesHigh-tech materials provide unmatched reliability and performanceRebuild the engine and transmission with total confidence as each set is...$19.21
Moose Offroad - Slave Cylinder/Case Saver Guard - Gas Gas/KTM/Husqvarna - Multiple Gas Gas/Husqvarna/KTM Models
Moose Offroad
$42.95Moose Offroad - 09500994 - Slave Cylinder/Case Saver Guard - Gas Gas/KTM/HusqvarnaFeaturesSpecialized applications guard hydraulic clutch cylinders and features knockdown bars to keep your chain in...$42.95
Moose Offroad - Ignition Wire Guard - Fits 2013-2023 Sherco SCF/SEF 250/300
Moose Offroad
$29.95Moose Offroad - 09500995 - Ignition Wire Guard - ShercoFeaturesEasy installation by removing top two screws for ignition cover placing over the exposed wire then re-installing screwsSpecs$29.95
Moose Offroad - Piston Kit - 97.00 mm - Fits 2010-2019 Yamaha YZ450F 13:1 Race Piston
Moose Offroad
$386.95Moose Offroad - 09106483 - Piston Kit - 97.00 mm - YamahaFeaturesFull radius dome designs maximize quench while eliminating hot spots that promote detonationInternal bracing maximizes durability...$386.95
Moose Offroad - Piston Kit - 79.00 mm - Honda
Moose Offroad
$386.95Moose Offroad - 09106518 - Piston Kit - 79.00 mm - HondaFeaturesFull radius dome designs maximize quench while eliminating hot spots that promote detonationInternal bracing maximizes durability while...$386.95
Moose Offroad - Piston Kit - 78.00 mm - Husqvarna | KTM - Fits 2016-2022 Husqvarna FC 250 14.7:1 Pro Race Piston, 2016-2022 KTM 250 SX-F 14.7:1 Pro Race Piston
Moose Offroad
$471.95Moose Offroad - 09106499 - Piston Kit - 78.00 mm - Husqvarna | KTMFeaturesFull radius dome designs maximize quench while eliminating hot spots that promote detonationInternal bracing maximizes...$471.95
Moose Offroad - Piston Kit - 96.00 mm - Fits 2002-2008 Honda CRF450R 12.5:1
Moose Offroad
$326.95Moose Offroad - 09106466 - Piston Kit - 96.00 mm - HondaFeaturesFull radius dome designs maximize quench while eliminating hot spots that promote detonationInternal bracing maximizes durability while...$326.95
Moose Offroad - Cam Chain - 96RH2015 x108 Links - Fits 2009-2016 Honda CRF450R
Moose Offroad
$59.07Moose Offroad - 09251427 - Cam Chain - 96RH2015 x108 LinksFeaturesLightweight and great durabilityFeatures precision solid bushings and shot-peened, providing maximum strengthMade to meet or exceed...$59.07
Moose Offroad - Cam Chain - 92RH2010 x 94 Links
Moose Offroad
$36.00Moose Offroad - 09251432 - Cam Chain - 92RH2010 x 94 LinksFeaturesLightweight and great durabilityFeatures precision solid bushings and shot-peened, providing maximum strengthMade to meet or exceed...$36.00
Moose Offroad - Cam Chain - 92RH2005 x 104 Links
Moose Offroad
$45.07Moose Offroad - 09251426 - Cam Chain - 92RH2005 x 104 LinksFeaturesLightweight and great durabilityFeatures precision solid bushings and shot-peened, providing maximum strengthMade to meet or exceed...$45.07
Moose Offroad - Cam Chain - DID25H x 90 Links - Fits Honda 2013-2016 CRF110F, 2015-2018 CRF125F
Moose Offroad
$41.07Moose Offroad - 09251424 - Cam Chain - DID25H x 90 LinksFeaturesLightweight and great durabilityFeatures precision solid bushings and shot-peened, providing maximum strengthMade to meet or exceed OEM...$41.07
Moose Offroad - Cam Chain - 6.35 mm x 108 Links
Moose Offroad
$75.07Moose Offroad - 09251437 - Cam Chain - 6.35 mm x 108 LinksFeaturesLightweight and great durabilityFeatures precision solid bushings and shot-peened, providing maximum strengthMade to meet or exceed...$75.07
Moose Offroad - Cam Chain - 92RH2015 x 96 Links
Moose Offroad
$50.95Moose Offroad - 09251425 - Cam Chain - 92RH2015 x 96 LinksFeaturesLightweight and great durabilityFeatures precision solid bushings and shot-peened, providing maximum strengthMade to meet or exceed...$50.95
Moose Offroad - Gasket Clutch Inner - Kawasaki
Moose Offroad
$20.73Moose Offroad - 09346896 - Gasket Clutch Inner - KawasakiFeaturesMade in the USASpecsTypeClutch$20.73
Moose Offroad - Slave Cylinder/Case Saver Guard - Gas Gas/Husqvarna/KTM - Multiple Models
Moose Offroad
$42.95Moose Offroad - 09500993 - Slave Cylinder/Case Saver Guard - Gas Gas/Husqvarna/KTMFeaturesSpecialized applications guard hydraulic clutch cylinders and features knockdown bars to keep your chain in...$42.95
Moose Offroad - Outer Clutch Cover Gasket - Kawasaki
Moose Offroad
$7.28Moose Offroad - M817461 - Outer Clutch Cover Gasket - KawasakiFeaturesMade in the USAReplacement Part for OEM Number(s):110601186,110601494Specs$7.28
Moose Offroad - Cam Chain - 92RH2010 x 114 Links
Moose Offroad
$51.07Moose Offroad - 09251498 - Cam Chain - 92RH2010 x 114 LinksFeaturesLightweight and great durabilityFeatures precision solid bushings and shot-peened, providing maximum strengthMade to meet or exceed...$51.07
Dirt Bike Pistons, Top-End Kits and Engine Rebuild Parts
Every dirt bike engine needs a refresh eventually. Ride long enough and the piston wears, compression drops and the bike just doesn't pull like it used to. Staying on top of top-end maintenance keeps your bike making power and keeps a cheap rebuild from turning into an expensive one.
We carry pistons and complete top-end kits from Vertex, Wossner, ProX and Athena, full gasket sets from Cometic and Athena, plus valves, springs, cam chains, bearings, seals and crank kits for full rebuilds. Boyesen reed valves and engine covers add performance and protection on two-strokes and four-strokes alike.
While the engine is apart, refresh the rest: fresh air filters and carb parts from fuel and intake, oil filters and fluids from oils and chemicals, and repacking or a new pipe from dirt bike exhaust.
Engine parts are specific to make, model, year and sometimes bore size, so check fitment carefully before ordering. If you're not sure what your rebuild needs, send us your bike's details and we'll help put the parts list together.