Dirt Bike Engine
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 - Crank Bearings and Seals - Multiple Models
Moose Offroad
$148.95Moose Offroad - 09240220 - Crank Bearings and SealsFeaturesKit contains right and left crankshaft bearings; 2-stroke kit contains outer sealsSeals designed with a fluorocarbon lip to reduce dry start...$148.95 -
Moose Offroad - Inner Clutch Cover Gasket - KTM/Polaris - KTM EXC, XC-W, 525 & More
Moose Offroad
$15.23Moose Offroad - 09341449 - Inner Clutch Cover Gasket - KTM/PolarisFeaturesMade in the USASpecsRiding Style<$15.23 -
Moose Offroad - Head Cover Gasket - Kawasaki/Suzuki
Moose Offroad
$24.96Moose Offroad - 09341464 - Head Cover Gasket - Kawasaki/SuzukiFeaturesHigh-tech materials provide unmatched reliability and performanceRebuild the engine and transmission with total confidence as...$24.96 -
Moose Offroad - Motor Gasket Kit with Oil Seal - Husaberg/Husqvarna/KTM
Moose Offroad
$94.32Moose Offroad - 09340476 - Motor Gasket Kit with Oil Seal - Husaberg/Husqvarna/KTMFeaturesRebuild the engine and transmission with total confidence as each set is designed for durability and accurate...$94.32 -
Moose Offroad - Motor Gasket Kit with Oil Seal - Suzuki
Moose Offroad
$90.04Moose Offroad - M811581 - Motor Gasket Kit with Oil Seal - SuzukiFeaturesRebuild the engine and transmission with total confidence as each set is designed for durability and accurate fitOil seals are...$90.04 -
Moose Offroad - Valve Shim - 7.48 x 1.70 - 5 pack
Moose Offroad
$10.95Moose Offroad - 09261868 - Valve Shim - 7.48 x 1.70 - 5 packFeaturesForged from 4140 cold rolled steel, not sinteredLaser-etched size on each shim for identificationA great addition to any mechanic's...$10.95 -
Moose Offroad - Valve Shim - 7.48 x 1.65 - 5 pack
Moose Offroad
$10.95Moose Offroad - 09261867 - Valve Shim - 7.48 x 1.65 - 5 packFeaturesForged from 4140 cold rolled steel, not sinteredLaser-etched size on each shim for identificationA great addition to any mechanic's...$10.95 -
Moose Offroad - Valve Shim - 7.48 x 1.45 - 5 pack
Moose Offroad
$10.95Moose Offroad - 09261863 - Valve Shim - 7.48 x 1.45 - 5 packFeaturesForged from 4140 cold rolled steel, not sinteredLaser-etched size on each shim for identificationA great addition to any mechanic's...$10.95 -
Moose Offroad - Valve Shim - 7.48 x 1.55 - 5 pack
Moose Offroad
$10.95Moose Offroad - 09261865 - Valve Shim - 7.48 x 1.55 - 5 packFeaturesForged from 4140 cold rolled steel, not sinteredLaser-etched size on each shim for identificationA great addition to any mechanic's...$10.95 -
Moose Offroad - Valve Shim - 7.48 x 1.35 - 5 pack
Moose Offroad
$10.95Moose Offroad - 09261861 - Valve Shim - 7.48 x 1.35 - 5 packFeaturesForged from 4140 cold rolled steel, not sinteredLaser-etched size on each shim for identificationA great addition to any mechanic's...$10.95 -
Moose Offroad - Valve Shim - 7.48 x 1.30 - 5 pack
Moose Offroad
$10.95Moose Offroad - 09261860 - Valve Shim - 7.48 x 1.30 - 5 packFeaturesForged from 4140 cold rolled steel, not sinteredLaser-etched size on each shim for identificationA great addition to any mechanic's...$10.95 -
Moose Offroad - Valve Shim - 10.0 x 2.60 - 5 pack
Moose Offroad
$10.95Moose Offroad - 09261845 - Valve Shim - 10.0 x 2.60 - 5 packFeaturesForged from 4140 cold rolled steel, not sinteredLaser-etched size on each shim for identificationA great addition to any mechanic's...$10.95 -
Moose Offroad - Top End Gasket Kit - Husaberg/Husqvarna/KTM - Fits 2011-2014 Husqvarna TE 300, 2014-2016 Husqvarna TE 300, 2008-2016 KTM 300 XC, 2008-2016 KTM 300 XC-W, 2014-2016 KTM 300 XC-W Six Days
Moose Offroad
$40.11Moose Offroad - 09341691 - Top End Gasket Kit - Husaberg/Husqvarna/KTMFeaturesHigh-tech materials provide unmatched reliability and performanceRebuild the engine and transmission with total...$40.11 -
Moose Offroad - Motor Oil Seals - Fits KTM 1998-2001 65 SX, 2002-2008 65 SX, 2008 65 XC
Moose Offroad
$35.24Moose Offroad - 09340164 - Motor Oil Seals - KTMFeaturesHigh-tech materials provide unmatched reliability and performanceRebuild the engine and transmission with total confidence as each set is...$35.24 -
Moose Offroad - Valve Shim Kit - 10.00 mm
Moose Offroad
$110.00Moose Offroad - 09261829 - Valve Shim Kit - 10.00 mmFeaturesForged from 4140 cold rolled steel, not sinteredLaser-etched size on each shim for identificationA great addition to any mechanic's tool...$110.00 -
Moose Offroad - Valve and Spring Kit - Yamaha WR250F | YZ250F - Fits 2002-2013 Yamaha WR/YZ250F
Moose Offroad
$307.95Moose Offroad - 09262457 - Valve and Spring Kit - Yamaha WR250F | YZ250FFeaturesExtend the life of the valve train and intake components by as much as 4x over the OEM titanium partsValves are...$307.95 -
Moose Offroad - Piston Ring - For 44.97 mm Piston - Fits 2021-2023 Gas Gas MC 65, 2017-2023 Husqvarna TC 65, 1997-2023 KTM 65 SX
Moose Offroad
$24.95Moose Offroad - 09120396 - Piston Ring - For 44.97 mm PistonFeaturesWear resistant made either from nitride or are chrome platedSpecs$24.95 -
Moose Offroad - Piston Ring - For 47.45 mm Piston
Moose Offroad
$24.10Moose Offroad - 09120397 - Piston Ring - For 47.45 mm PistonFeaturesWear resistant made either from nitride or are chrome platedSpecs$24.10 -
Moose Offroad - Piston Ring - For 44.45 mm Piston - Fits 2000-2023 Kawasaki KX65, 2003-2006 Suzuki RM65
Moose Offroad
$23.95Moose Offroad - 09120395 - Piston Ring - For 44.45 mm PistonFeaturesWear resistant made either from nitride or are chrome platedSpecs$23.95 -
Moose Offroad - Valve and Spring Kit - Yamaha W250F | YZ250F - Fits 2002-2013 Yamaha WR/YZ250F
Moose Offroad
$217.95Moose Offroad - 09262458 - Valve and Spring Kit - Yamaha W250F | YZ250FFeaturesExtend the life of the valve train and intake components by as much as 4x over the OEM titanium partsValves are designed...$217.95 -
Moose Offroad - Valve and Spring Kit - Suzuki RMZ450 - Fits 2005-2006 Suzuki RM-Z450
Moose Offroad
$196.95Moose Offroad - 09262448 - Valve and Spring Kit - Suzuki RMZ450FeaturesExtend the life of the valve train and intake components by as much as 4x over the OEM titanium partsValves are designed to not...$196.95 -
Moose Offroad - Valve and Spring Kit - Suzuki RMZ250 - Fits 2007-2017 Suzuki RM-Z250
Moose Offroad
$217.95Moose Offroad - 09262449 - Valve and Spring Kit - Suzuki RMZ250FeaturesExtend the life of the valve train and intake components by as much as 4x over the OEM titanium partsValves are designed to not...$217.95 -
Moose Offroad - Snap Ring - 10 Pack - Kawasaki/Suzuki - Multiple Kawasaki/Suzuki Models
Moose Offroad
$26.95Moose Offroad - 09350492 - Snap Ring - 10 Pack - Kawasaki/SuzukiFeaturesIndividually wrapped washer kit sold in a 10-pack unitReplacement Part for OEM Number(s):920331079Specs$26.95 -
Moose Offroad - Valve Shim - 10.0 x 1.90 - 5 pack
Moose Offroad
$10.95Moose Offroad - 09261831 - Valve Shim - 10.0 x 1.90 - 5 packFeaturesForged from 4140 cold rolled steel, not sinteredLaser-etched size on each shim for identificationA great addition to any mechanic's...$10.95 -
Moose Offroad - Piston Kit - 53.96 mm - Fits 2000-2003 Suzuki RM125
Moose Offroad
$170.95Moose Offroad - 09102688 - Piston Kit - 53.96 mm - SuzukiFeaturesWrist pin is nitride-coated, providing a hardened, wear-resistant bearing surfaceCoated skirt ease break-in, decreasing wear and...$170.95 -
Moose Offroad - Piston Kit - 66.36 mm - Kawasaki
Moose Offroad
$203.65Moose Offroad - 09102679 - Piston Kit - 66.36 mm - KawasakiFeaturesWrist pin is nitride-coated, providing a hardened, wear-resistant bearing surfaceCoated skirt ease break-in, decreasing wear and...$203.65 -
Moose Offroad - Cylinder - 78.00 mm - Fits Honda 2004-2009 CRF250R, 2004-2017 CRF250X
Moose Offroad
$340.95Moose Offroad - 09310441 - Cylinder - 78.00 mm - HondaFeaturesExtremely durable low-friction bore surface allows for greater heat dissipationMade from cast aluminum; nickel silicon carbide...$340.95 -
Moose Offroad - Valve Shim - 7.48 x 3.35 - 5 pack
Moose Offroad
$9.95Moose Offroad - 09261901 - Valve Shim - 7.48 x 3.35 - 5 packFeaturesForged from 4140 cold rolled steel, not sinteredLaser-etched size on each shim for identificationA great addition to any mechanic's...$9.95 -
Moose Offroad - Cylinder - 77.00 mm - Kawasaki | Suzuki - Fits 2004-2006 Suzuki RM-Z250, 2004-2008 Kawasaki KX250F
Moose Offroad
$380.95Moose Offroad - 09310456 - Cylinder - 77.00 mm - Kawasaki | SuzukiFeaturesExtremely durable low-friction bore surface allows for greater heat dissipationMade from cast aluminum; nickel silicon...$380.95 -
Moose Offroad - Valve Shim - 7.48 x 3.40 - 5 pack
Moose Offroad
$9.95Moose Offroad - 09261902 - Valve Shim - 7.48 x 3.40 - 5 packFeaturesForged from 4140 cold rolled steel, not sinteredLaser-etched size on each shim for identificationA great addition to any mechanic's...$9.95 -
Moose Offroad - Valve Shim - 7.48 x 3.25 - 5 pack
Moose Offroad
$9.95Moose Offroad - 09261899 - Valve Shim - 7.48 x 3.25 - 5 packFeaturesForged from 4140 cold rolled steel, not sinteredLaser-etched size on each shim for identificationA great addition to any mechanic's...$9.95 -
Moose Offroad - Valve Shim - 7.48 x 3.20 - 5 pack
Moose Offroad
$9.95Moose Offroad - 09261898 - Valve Shim - 7.48 x 3.20 - 5 packFeaturesForged from 4140 cold rolled steel, not sinteredLaser-etched size on each shim for identificationA great addition to any mechanic's...$9.95 -
Moose Offroad - Valve Shim - 7.48 x 3.15 - 5 pack
Moose Offroad
$9.95Moose Offroad - 09261897 - Valve Shim - 7.48 x 3.15 - 5 packFeaturesForged from 4140 cold rolled steel, not sinteredLaser-etched size on each shim for identificationA great addition to any mechanic's...$9.95 -
Moose Offroad - Valve Shim - 7.48 x 2.90 - 5 pack
Moose Offroad
$10.95Moose Offroad - 09261892 - Valve Shim - 7.48 x 2.90 - 5 packFeaturesForged from 4140 cold rolled steel, not sinteredLaser-etched size on each shim for identificationA great addition to any mechanic's...$10.95 -
Moose Offroad - Valve Shim - 7.48 x 2.80 - 5 pack
Moose Offroad
$10.95Moose Offroad - 09261890 - Valve Shim - 7.48 x 2.80 - 5 packFeaturesForged from 4140 cold rolled steel, not sinteredLaser-etched size on each shim for identificationA great addition to any mechanic's...$10.95 -
Moose Offroad - Case Saver - RMZ250 - Fits Suzuki 2007-2018 RM-Z250, 2005-2017 RM-Z450
Moose Offroad
$27.95Moose Offroad - 09500520 - Case Saver - RMZ250FeaturesBetter looking and more sturdy than OEM plastic guardsEngraved logoMounting hardware includedMade in the U.S.A.Specs$27.95 -
Moose Offroad - Piston Kit - 44.45 mm - Kawasaki | Suzuki
Moose Offroad
$113.35Moose Offroad - 09102697 - Piston Kit - 44.45 mm - Kawasaki | SuzukiFeaturesWrist pin is nitride-coated, providing a hardened, wear-resistant bearing surfaceCoated skirt ease break-in, decreasing...$113.35 -
Moose Offroad - Valve and Spring Kit - Honda CRF250R - Fits 2010-2015 Honda CRF250R
Moose Offroad
$217.95Moose Offroad - 09262435 - Valve and Spring Kit - Honda CRF250RFeaturesExtend the life of the valve train and intake components by as much as 4x over the OEM titanium partsValves are designed to not...$217.95 -
Moose Offroad - Case Saver - KX450F - Fits 2006-2015 Kawasaki KX450F
Moose Offroad
$27.95Moose Offroad - 09500518 - Case Saver - KX450FFeaturesBetter looking and more sturdy than OEM plastic guardsEngraved logoMounting hardware includedMade in the U.S.A.Specs$27.95 -
Moose Offroad - Valve and Spring Kit - Honda CRF450X - Fits 2005-2017 Honda CRF450X
Moose Offroad
$196.95Moose Offroad - 09262438 - Valve and Spring Kit - Honda CRF450XFeaturesExtend the life of the valve train and intake components by as much as 4x over the OEM titanium partsValves are designed to not...$196.95
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.