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.
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Out of stock
Prox - 35.6327 - Top End Gasket Set - KTM/Husaberg/Husqvarna - Fits 2011-2014 Husqvarna TE 250, 2014-2016 Husqvarna TE 250, 2008-2016 KTM 250 XC-W, 2008-2016 KTM 250 XC
Prox
$44.05Prox - 09345790 - Top End Gasket Set - KTM/Husaberg/HusqvarnaFeaturesPrecision engineering and the use of first-class materials guarantee the quality you demandSpecs$44.05 -
Out of stock
Prox - 35.6348 - Top End Gasket Set - KTM/Husqvarna/Husaberg - Fits 2011-2014 Husqvarna TE 300, 2014-2016 Husqvarna TE 300, 2008-2016 KTM 300 XC, 2008-2016 KTM 300 XC-W
Prox
$34.95Prox - 09345796 - Top End Gasket Set - KTM/Husqvarna/HusabergFeaturesPrecision engineering and the use of first-class materials guarantee the quality you demandSpecs$34.95 -
Out of stock
Prox - 35.6103 - Top End Gasket Set - Fits 2003-2012 KTM 85 SX
Prox
$29.95Prox - 09345776 - Top End Gasket Set - KTMFeaturesPrecision engineering and the use of first-class materials guarantee the quality you demandSpecs$29.95 -
Out of stock
Prox - 34.1220 - Gasket Kit - Complete - Fits 2000-2002 Honda CR125R
Prox
$93.95Prox - 09345520 - Gasket Kit - Complete - HondaFeaturesSpecsEngine Type2-Stroke$93.95 -
Out of stock
Prox - 35.4409 - Top End Gasket Set - Kawasaki KX 500
Prox
$44.95Prox - 09345770 - Top End Gasket Set - Kawasaki KX 500FeaturesPrecision engineering and the use of first-class materials guarantee the quality you demandSpecs$44.95 -
Out of stock
Prox - 35.4215 - Top End Gasket Set - Kawasaki KX 125 - Fits 1995-1997 Kawasaki KX125
Prox
$39.95Prox - 09345756 - Top End Gasket Set - Kawasaki KX 125FeaturesPrecision engineering and the use of first-class materials guarantee the quality you demandSpecs$39.95 -
Out of stock
Prox - 35.3323 - Top End Gasket Set - Suzuki RM 250 - Fits 2003-2005 Suzuki RM250
Prox
$41.95Prox - 09345733 - Top End Gasket Set - Suzuki RM 250FeaturesPrecision engineering and the use of first-class materials guarantee the quality you demandSpecs$41.95 -
Out of stock
Prox - 35.3311 - Top End Gasket Set - Suzuki RM 250
Prox
$34.95Prox - 09345728 - Top End Gasket Set - Suzuki RM 250FeaturesPrecision engineering and the use of first-class materials guarantee the quality you demandSpecs$34.95 -
Out of stock
Prox - 35.2423 - Top End Gasket Set - Fits 2003-2006 Yamaha WR450F
Prox
$67.95Prox - 09345710 - Top End Gasket Set - YamahaFeaturesPrecision engineering and the use of first-class materials guarantee the quality you demandSpecs$67.95 -
Out of stock
Prox - 35.2418 - Top End Gasket Set - Yamaha
Prox
$69.95Prox - 09345708 - Top End Gasket Set - YamahaFeaturesPrecision engineering and the use of first-class materials guarantee the quality you demandSpecs$69.95 -
Out of stock
Prox - 35.2113 - Top End Gasket Set - Yamaha YZ 80 - Fits 1993-2001 Yamaha YZ80
Prox
$22.95Prox - 09345685 - Top End Gasket Set - Yamaha YZ 80FeaturesPrecision engineering and the use of first-class materials guarantee the quality you demandSpecs$22.95 -
Out of stock
Prox - 35.7334 - Top End Gasket Set - Fits 2014-2018 Sherco SE/SE-R 300
Prox
$54.95Prox - 09347152 - Top End Gasket Set - ShercoFeaturesPrecision engineering and the use of first-class materials guarantee the quality you demandSpecs$54.95 -
Out of stock
Prox - 35.6319 - Top End Gasket Set - Husqvarna/Gas Gas/KTM - Fits 2021-2023 Gas Gas EX/MC 350F, 2019-2022 Husqvarna FC/FX 350, 2019-2022 KTM 350 SX-F/XC-F
Prox
$89.95Prox - 09347151 - Top End Gasket Set - Husqvarna/Gas Gas/KTMFeaturesPrecision engineering and the use of first-class materials guarantee the quality you demandSpecs$89.95 -
Out of stock
Prox - 35.4426 - Top End Gasket Set - Kawasaki KX 450 F - Fits 2016-2018 Kawasaki KX450F
Prox
$94.95Prox - 09347139 - Top End Gasket Set - Kawasaki KX 450 FFeaturesPrecision engineering and the use of first-class materials guarantee the quality you demandSpecs$94.95 -
Out of stock
Prox - 35.4317 - Top End Gasket Set - Kawasaki KX 250 F - Fits 2017-2018 Kawasaki KX250F
Prox
$79.95Prox - 09347138 - Top End Gasket Set - Kawasaki KX 250 FFeaturesPrecision engineering and the use of first-class materials guarantee the quality you demandSpecs$79.95 -
Out of stock
Prox - 57.3023 - Water Pump Rebuild Kit - Kawasaki/Suzuki
Prox
MSRP: $44.95$43.74Prox - 09347024 - Water Pump Rebuild Kit - Kawasaki/SuzukiFeaturesRepair kit includes all necessary gaskets, O-rings, bearings and sealsSpecsMSRP: $44.95$43.74 -
Out of stock
Prox - 35.1236 - Top End Gasket Set - Honda CRF150F - Fits 2006-2017 Honda CRF150F
Prox
$44.95Prox - 09345664 - Top End Gasket Set - Honda CRF150FFeaturesPrecision engineering and the use of first-class materials guarantee the quality you demandSpecs$44.95 -
Out of stock
Prox - 35.1322 - Top End Gasket Set - Honda CR250R
Prox
$39.95Prox - 09345669 - Top End Gasket Set - Honda CR250RFeaturesPrecision engineering and the use of first-class materials guarantee the quality you demandSpecs$39.95 -
Out of stock
Prox - 35.1220 - Top End Gasket Set - Fits 2000-2002 Honda CR125R
Prox
$39.95Prox - 09345658 - Top End Gasket Set - HondaFeaturesPrecision engineering and the use of first-class materials guarantee the quality you demandSpecs$39.95 -
Out of stock
Prox - 35.1233 - Top End Gasket Set - Honda CRF150F
Prox
$69.95Prox - 09345663 - Top End Gasket Set - Honda CRF150FFeaturesPrecision engineering and the use of first-class materials guarantee the quality you demandSpecs$69.95 -
Out of stock
Prox - 34.6520 - Gasket Kit - Complete - Fits KTM 2003-2006 450 SX, 2000-2007 520/525 EXC, 2000-2007 520/525 SX
Prox
$214.95Prox - 09345648 - Gasket Kit - Complete - KTMFeaturesSpecsProduct NameGasket Kit$214.95 -
Out of stock
Prox - 34.6227 - Gasket Kit - Complete - KTM/ Husqvarna/Husaberg - Multiple Husqvarna/KTM Models
Prox
$130.95Prox - 09345620 - Gasket Kit - Complete - KTM/ Husqvarna/HusabergFeaturesSpecsEngine Type2-Stroke<$130.95 -
Out of stock
Prox - 34.6320 - Gasket Kit - Complete - Fits KTM 2003-2012 200 SX, 2000-2002 250 SX
Prox
$94.95Prox - 09345625 - Gasket Kit - Complete - KTMFeaturesSpecsEngine Type2-Stroke$94.95 -
Out of stock
Prox - 34.4409 - Gasket Kit - Complete - Kawasaki
Prox
$115.95Prox - 09345608 - Gasket Kit - Complete - KawasakiFeaturesSpecsProduct NameGasket Kit$115.95 -
Out of stock
Prox - 34.6018 - Gasket Kit - Complete - KTM
Prox
$94.95Prox - 09345613 - Gasket Kit - Complete - KTMFeaturesSpecsTypeComplete$94.95 -
Out of stock
Prox - 34.6011 - Gasket Kit - Complete - Fits 2001-2008 KTM 50 SX
Prox
$49.95Prox - 09345611 - Gasket Kit - Complete - KTMFeaturesSpecsUnitsKitProd$49.95 -
Out of stock
Prox - 34.4285 - Gasket Kit - Complete - Fits 1995-2006 Kawasaki KDX200
Prox
$109.95Prox - 09345600 - Gasket Kit - Complete - KawasakiFeaturesSpecsProduct NameGasket Kit$109.95 -
Out of stock
Prox - 34.3323 - Gasket Kit - Complete - Fits 2003-2005 Suzuki RM250
Prox
$139.95Prox - 09345580 - Gasket Kit - Complete - SuzukiFeaturesSpecsProduct NameGasket Kit$139.95 -
Out of stock
Prox - 34.4021 - Gasket Kit - Complete - Suzuki/Kawasaki - Fits 2000-2005 Kawasaki KX65, 2003-2005 Suzuki RM65
Prox
$59.95Prox - 09345587 - Gasket Kit - Complete - Suzuki/KawasakiFeaturesSpecsRiding StyleOff-Road$59.95 -
Out of stock
Prox - 34.3316 - Gasket Kit - Complete - Fits 1991-1995 Suzuki RM250
Prox
$120.95Prox - 09345576 - Gasket Kit - Complete - SuzukiFeaturesSpecsProduct NameGasket Kit$120.95 -
Out of stock
Prox - 57.4318 - Water Pump Rebuild Kit - Fits Kawasaki 1991-1994 KDX250, 1988-1991 KX250
Prox
$44.95Prox - 09347050 - Water Pump Rebuild Kit - KawasakiFeaturesRepair kit includes all necessary gaskets, O-rings, bearings and sealsSpecs$44.95 -
Out of stock
Prox - 35.6420 - Top End Gasket Set - Fits KTM 2000-2006 400 EXC, 2000-2006 400 SX, 2003-2007 450 EXC
Prox
$79.95Prox - 09345798 - Top End Gasket Set - KTMFeaturesPrecision engineering and the use of first-class materials guarantee the quality you demandSpecs$79.95 -
Out of stock
Prox - 35.6018 - Top End Gasket Set - Fits 1998-2008 KTM 60/65 SX
Prox
$30.95Prox - 09345774 - Top End Gasket Set - KTMFeaturesPrecision engineering and the use of first-class materials guarantee the quality you demandSpecs$30.95 -
Out of stock
Prox - 35.4339 - Top End Gasket Set - Kawasaki KX 250 F - Fits 2009-2016 Kawasaki KX250F
Prox
$88.95Prox - 09345767 - Top End Gasket Set - Kawasaki KX 250 FFeaturesPrecision engineering and the use of first-class materials guarantee the quality you demandSpecs$88.95 -
Out of stock
Prox - 35.6248 - Top End Gasket Set - Fits KTM 1998-2002 200 EXC, 1998-2002 200 SX
Prox
$29.95Prox - 09345783 - Top End Gasket Set - KTMFeaturesPrecision engineering and the use of first-class materials guarantee the quality you demandSpecs$29.95 -
Out of stock
Prox - 35.4313 - Top End Gasket Set - Kawasaki KX 250
Prox
$46.95Prox - 09345763 - Top End Gasket Set - Kawasaki KX 250FeaturesPrecision engineering and the use of first-class materials guarantee the quality you demandSpecs$46.95 -
Out of stock
Prox - 35.1429 - Top End Gasket Set - Honda CRF450R - Fits 2009-2016 Honda CRF450R
Prox
$104.95Prox - 09345683 - Top End Gasket Set - Honda CRF450RFeaturesPrecision engineering and the use of first-class materials guarantee the quality you demandSpecs$104.95 -
Out of stock
Prox - 35.1210 - Top End Gasket Set - Fits 1990-1997 Honda CR125R
Prox
$39.95Prox - 09345656 - Top End Gasket Set - HondaFeaturesPrecision engineering and the use of first-class materials guarantee the quality you demandSpecs$39.95 -
Out of stock
Prox - 57.4215 - Water Pump Rebuild Kit - Fits 1995-2002 Kawasaki KX125
Prox
$49.30Prox - 09347042 - Water Pump Rebuild Kit - KawasakiFeaturesRepair kit includes all necessary gaskets, O-rings, bearings and sealsSpecs$49.30 -
Out of stock
Prox - 57.4319 - Water Pump Rebuild Kit - Fits 1989-1994 Kawasaki KDX200
Prox
$44.95Prox - 09347051 - Water Pump Rebuild Kit - KawasakiFeaturesRepair kit includes all necessary gaskets, O-rings, bearings and sealsSpecs$44.95
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.