Dirt Bike Engine
4752 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.
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
-
Moose Offroad - Valve Shim - 7.48 x 2.35 - 5 pack
Moose Offroad
$9.95Moose Offroad - 09261881 - Valve Shim - 7.48 x 2.35 - 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 - Valve Shim - 7.48 x 2.25 - 5 pack
Moose Offroad
$10.95Moose Offroad - 09261879 - Valve Shim - 7.48 x 2.25 - 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 2.30 - 5 pack
Moose Offroad
$10.95Moose Offroad - 09261880 - Valve Shim - 7.48 x 2.30 - 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 - 7.48 x 2.15 - 5 pack
Moose Offroad
$10.95Moose Offroad - 09261877 - Valve Shim - 7.48 x 2.15 - 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 - Clutch Cylinder Guard - KTM/Husqvarna - Multiple Husqvarna/KTM Models
Moose Offroad
$42.95Moose Offroad - 09500807 - Clutch Cylinder Guard - KTM/HusqvarnaFeaturesSpecialized applications guard hydraulic clutch cylinders and feature knockdown bars to keep your chain in checkTwo-stroke...$42.95 -
Moose Offroad - Water Pump Rebuild Kit - Husaberg/Husqvarna/KTM
Moose Offroad
MSRP: $44.36$43.80Moose Offroad - 09345201 - Water Pump Rebuild Kit - Husaberg/Husqvarna/KTMFeaturesKit includes the following: bearings where applicable; rubber seals; mechanical water pump seal where applicable;...MSRP: $44.36$43.80 -
Moose Offroad - Motor Gasket Kit with Oil Seal - Gas Gas/Husqvarna/KTM - Multiple Gas Gas/Husqvarna/KTM Models
Moose Offroad
$163.23Moose Offroad - 09345372 - Motor Gasket Kit with Oil Seal - Gas Gas/Husqvarna/KTMFeaturesRebuild the engine and transmission with total confidence as each set is designed for durability and accurate...$163.23 -
Moose Offroad - Case Saver - Fits Yamaha 2014-2017 YZ250F, 2015-2017 WR250F, 2014-2017 WR/YZ450F
Moose Offroad
$38.95Moose Offroad - 09500812 - Case Saver - YamahaFeaturesBetter looking and more sturdy than OEM plastic guardsEngraved logoMounting hardware includedMade in the U.S.A.Specs$38.95 -
Moose Offroad - Gasket Material - Blue - .062" - 2 Pack
Moose Offroad
$46.41Moose Offroad - 09346978 - Gasket Material - Blue - .062" - 2 PackFeaturesMaterial is premium compressed sheet, manufactured with aramid and other synthetic fibers and uses an NBR (Nitrile Butadiene...$46.41 -
Moose Offroad - Motor Oil Seals - Husqvarna/KTM
Moose Offroad
$35.24Moose Offroad - 09340166 - Motor Oil Seals - Husqvarna/KTMFeaturesHigh-tech materials provide unmatched reliability and performanceRebuild the engine and transmission with total confidence as each...$35.24 -
Moose Offroad - Complete Gasket Kit - Gas Gas/Husqvarna/KTM - Fits 2021-2023 Gas Gas MC 65, 2018-2023 Husqvarna TC 65, 2009-2023 KTM 65 SX, 2013-2014 KTM 65 SXS, 2009 KTM 65 XC
Moose Offroad
$73.12Moose Offroad - 09341907 - Complete Gasket Kit - Gas Gas/Husqvarna/KTMFeaturesHigh-tech materials provide unmatched reliability and performanceRebuild the engine and transmission with total...$73.12 -
Moose Offroad - Gasket Material - Green - .015" - 2 Pack
Moose Offroad
$34.29Moose Offroad - 09346977 - Gasket Material - Green - .015" - 2 PackFeaturesMaterial is premium compressed sheet, manufactured with aramid and other synthetic fibers and uses an NBR (Nitrile Butadiene...$34.29 -
Moose Offroad - Motor Oil Seals - Gas Gas/Husqvarna/KTM - Multiple Gas Gas/Husqvarna/KTM Models
Moose Offroad
MSRP: $41.12$40.60Moose Offroad - 09350947 - Motor Oil Seals - Gas Gas/Husqvarna/KTMFeaturesHigh-tech materials provide unmatched reliability and performanceRebuild the engine and transmission with total confidence as...MSRP: $41.12$40.60 -
Moose Offroad - Complete Gasket Kit with Oil Seal - Gas Gas/Husqvarna/KTM - Multiple Gas Gas/Husqvarna/KTM Models
Moose Offroad
$107.09Moose Offroad - 09341905 - Complete Gasket Kit with Oil Seal - Gas Gas/Husqvarna/KTMFeaturesRebuild the engine and transmission with total confidence as each set is designed for durability and...$107.09 -
Moose Offroad - Motor Oil Seals - Fits 2009-2016 Honda CRF450R
Moose Offroad
MSRP: $57.47$20.52Moose Offroad - 09350399 - Motor Oil Seals - HondaFeaturesHigh-tech materials provide unmatched reliability and performanceRebuild the engine and transmission with total confidence as each set is...MSRP: $57.47$20.52 -
Moose Offroad - Motor Gasket Kit with Oil Seal - Kawasaki
Moose Offroad
$70.33Moose Offroad - M811455 - Motor Gasket Kit with Oil Seal - KawasakiFeaturesRebuild the engine and transmission with total confidence as each set is designed for durability and accurate fitOil seals...$70.33 -
Moose Offroad - Complete Motor Gasket Kit - KTM
Moose Offroad
$140.21Moose Offroad - 09340622 - Complete Motor Gasket Kit - KTMFeaturesHigh-tech materials provide unmatched reliability and performanceRebuild the engine and transmission with total confidence as each...$140.21 -
Moose Offroad - Water Pump Rebuild Kit - KTM
Moose Offroad
MSRP: $51.98$51.32Moose Offroad - 09345206 - Water Pump Rebuild Kit - KTMFeaturesKit includes the following: bearings where applicable; rubber seals; mechanical water pump seal where applicable; side cover gasket;...MSRP: $51.98$51.32 -
Moose Offroad - Top End Gasket Kit - Husqvarna/KTM - Multiple Husqvarna/KTM Models
Moose Offroad
$97.12Moose Offroad - 09342206 - Top End Gasket Kit - Husqvarna/KTMFeaturesHigh-tech materials provide unmatched reliability and performanceRebuild the engine and transmission with total confidence as each...$97.12 -
Moose Offroad - Motor Gasket Kit with Oil Seal - Husqvarna/KTM - Fits 2014-2015 Husqvarna TC 125, 2015-2016 Husqvarna TE 125, 2002-2006 KTM 125 EXC, 2002-2006 KTM 125 SX
Moose Offroad
$103.61Moose Offroad - 09340112 - Motor Gasket Kit with Oil Seal - Husqvarna/KTMFeaturesRebuild the engine and transmission with total confidence as each set is designed for durability and accurate fitOil...$103.61 -
Moose Offroad - Motor Gasket Kit with Oil Seal - Yamaha
Moose Offroad
$56.72Moose Offroad - M811639 - Motor Gasket Kit with Oil Seal - YamahaFeaturesRebuild the engine and transmission with total confidence as each set is designed for durability and accurate fitOil seals are...$56.72 -
Moose Offroad - Complete Motor Gasket Kit with Oil Seals - Fits 2016-2024 Suzuki RM-Z250
Moose Offroad
$182.97Moose Offroad - 09346112 - Complete Motor Gasket Kit with Oil Seals - SuzukiFeaturesValve seals also includedIncludes formed rubber valve cover gasketsOil seals are genuine OEM replacement sealsMade...$182.97 -
Moose Offroad - Top End Gasket Kit - 99 mm OB - Fits 2005-2024 Honda CRF450X (99 mm overbore)
Moose Offroad
MSRP: $93.07$89.47Moose Offroad - 09346108 - Top End Gasket Kit - 99 mm OB - HondaFeaturesHigh-tech materials provide unmatched reliability and performanceRebuild the engine and transmission with total confidence as...MSRP: $93.07$89.47 -
Moose Offroad - Complete Motor Gasket Kit - Kawasaki/Yamaha - Fits 2006-2024 Kawasaki KX65
Moose Offroad
$58.40Moose Offroad - 09346100 - Complete Motor Gasket Kit - Kawasaki/YamahaFeaturesHigh-tech materials provide unmatched reliability and performanceRebuild the engine and transmission with total...$58.40 -
Moose Offroad - Connecting Rod - Fits 2009-2018 Kawasaki KX450F
Moose Offroad
$474.95Moose Offroad - 09230307 - Connecting Rod - KawasakiFeatures100% machined from an oversized forging ensures proper grain flow and consistency through the manufacturing processMade from proprietary...$474.95 -
Moose Offroad - Connecting Rod - Kawasaki | Suzuki | Yamaha - Fits 2004-2009 Kawasaki KX250F, 2014-2025 Yamaha YZ250F, 2004-2026 Suzuki RM-Z250
Moose Offroad
$474.95Moose Offroad - 09230306 - Connecting Rod - Kawasaki | Suzuki | YamahaFeatures100% machined from an oversized forging ensures proper grain flow and consistency through the manufacturing processMade...$474.95 -
Moose Offroad - Engine Oil Seal Kit - Yamaha
Moose Offroad
$34.10Moose Offroad - 09351022 - Engine Oil Seal Kit - YamahaFeaturesMade in the USADoes not include valve stem seal.Specs$34.10 -
Moose Offroad - Engine Oil Seal Kit - Fits 2010-2017 Honda CRF250R
Moose Offroad
$62.26Moose Offroad - 09351027 - Engine Oil Seal Kit - HondaFeaturesMade in the USADoes not include valve stem seal.Specs$62.26 -
Moose Offroad - Crank Bearings and Seals - Yamaha - Multiple Suzuki/Yamaha Models
Moose Offroad
$54.95Moose Offroad - 09240216 - Crank Bearings and Seals - YamahaFeaturesKit contains right and left crankshaft bearings; 2-stroke kit contains outer sealsSeals designed with a fluorocarbon lip to reduce...$54.95 -
Moose Offroad - Inner Clutch Cover Gasket - Gas Gas/Husqvarna/KTM - Multiple Gas Gas/Husqvarna/KTM Models
Moose Offroad
MSRP: $28.50$28.13Moose Offroad - 09346151 - Inner Clutch Cover Gasket - Gas Gas/Husqvarna/KTMFeaturesMade in the USASpecsMountingMSRP: $28.50$28.13 -
Moose Offroad - Connecting Rod - Fits 2018-2026 Honda CRF250R
Moose Offroad
$474.95Moose Offroad - 09230510 - Connecting Rod - HondaFeatures100% machined from an oversized forging ensures proper grain flow and consistency through the manufacturing processMade from proprietary...$474.95 -
Moose Offroad - Outer Clutch Cover Gasket - Husqvarna/KTM
Moose Offroad
$9.97Moose Offroad - 09341455 - Outer Clutch Cover Gasket - Husqvarna/KTMFeaturesMade in the USAReplacement Part for OEM Number(s):47030027100Specs$9.97 -
Moose Offroad - Inner Clutch Cover Gasket - Husqvarna/KTM
Moose Offroad
$42.03Moose Offroad - 09346123 - Inner Clutch Cover Gasket - Husqvarna/KTMFeaturesMade in the USASpecsProduct Name$42.03 -
Moose Offroad - Outer Clutch Cover Gasket - Gas Gas/Husqvarna/KTM
Moose Offroad
MSRP: $13.81$13.64Moose Offroad - 09345899 - Outer Clutch Cover Gasket - Gas Gas/Husqvarna/KTMFeaturesMade in the USASpecsRiding SMSRP: $13.81$13.64 -
Moose Offroad - Valve Cover Gasket - Husqvarna/KTM
Moose Offroad
MSRP: $13.81$13.64Moose Offroad - 09346184 - Valve Cover Gasket - Husqvarna/KTMFeaturesMade in the USASpecsProduct NameGaMSRP: $13.81$13.64 -
Moose Offroad - Ignition Cover Gasket - Husqvarna/KTM
Moose Offroad
$10.02Moose Offroad - 09346156 - Ignition Cover Gasket - Husqvarna/KTMFeaturesMade in the USAReplacement Part for OEM Number(s):50330040000,50330040100Specs$10.02 -
Moose Offroad - Clutch Cover - Fits Honda 2018-2025 CRF250R, 2022-2025 CRF250RX
Moose Offroad
$159.95Moose Offroad - 09401851 - Clutch Cover - HondaFeaturesStronger than OEM coverDissipates heat better than OEM coverHard-coated finish for long-lasting durabilitySpecs$159.95 -
Moose Offroad - Clutch Cover - Fits Suzuki 2010-2019 RMX450Z, 2008-2024 RM-Z450
Moose Offroad
$157.95Moose Offroad - 09401861 - Clutch Cover - SuzukiFeaturesStronger than OEM coverDissipates heat better than OEM coverHard-coated finish for long-lasting durabilitySpecs$157.95 -
Moose Offroad - Oil Seal Kit - Gas Gas/Husqvarna/KTM - Multiple Gas Gas/Husqvarna/KTM Models
Moose Offroad
$43.37Moose Offroad - 09351056 - Oil Seal Kit - Gas Gas/Husqvarna/KTMFeaturesMade in the USADoes not include valve stem seal.Specs$43.37 -
Moose Offroad - Crank Bearings and Seals - Gas Gas/Rieju - Multiple Models
Moose Offroad
$89.95Moose Offroad - 09240603 - Crank Bearings and Seals - Gas Gas/RiejuFeaturesKit contains right and left crankshaft bearings; 2-stroke kit contains outer sealsSeals designed with a fluorocarbon lip to...$89.95
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.