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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Wossner - P2001 - Connecting Rod Kit - Kawasaki | Suzuki - Fits Kawasaki 1983-2003 KX60, 2000-2026 KX65
Wossner
$112.00Wossner - 09230388 - Connecting Rod Kit - Kawasaki | SuzukiFeaturesShot peened for ultimate strength and long life8620 forged alloyFEA (computer simulation) used to fine tune every designGerman...$112.00 -
Wossner - N1049 - Top End Bearing - 18 mm x 22 mm x 23.5 mm - Fits Kawasaki 1980-1984 KDX250, 1978-2007 KX250
Wossner
$18.50Wossner - 09240462 - Top End Bearing - 18 mm x 22 mm x 23.5 mmFeaturesPrecision manufactured from quality materialsSpecs$18.50 -
Wossner - N1022 - Top End Bearing - 18 mm x 23 mm x 21.8 mm - Multiple Suzuki/Yamaha Models
Wossner
$18.50Wossner - 09240458 - Top End Bearing - 18 mm x 23 mm x 21.8 mmFeaturesPrecision manufactured from quality materialsSpecs$18.50 -
Wossner - N1021 - Top End Bearing - 18 mm x 22 mm x 21.8 mm - Multiple Models
Wossner
$18.50Wossner - 09240457 - Top End Bearing - 18 mm x 22 mm x 21.8 mmFeaturesPrecision manufactured from quality materialsSpecs$18.50 -
Wossner - 8022DA - Piston Kit - 66.94 mm - Fits 1989-1995 Suzuki RM/RMX250
Wossner
$152.00Wossner - 09104731 - Piston Kit - 66.94 mm - SuzukiFeaturesOptimized machining for lightness, as well as maintained strength in key areas such as crown and skirt wall cross sectionForged from...$152.00 -
Wossner - 8021DA - Piston Kit - 66.34 mm - Honda
Wossner
$152.00Wossner - 09104727 - Piston Kit - 66.34 mm - HondaFeaturesOptimized machining for lightness, as well as maintained strength in key areas such as crown and skirt wall cross sectionForged from...$152.00 -
Wossner - 8017DB - Piston Kit - 71.94 mm - KTM
Wossner
$192.00Wossner - 09104711 - Piston Kit - 71.94 mm - KTMFeaturesOptimized machining for lightness, as well as maintained strength in key areas such as crown and skirt wall cross sectionForged from aerospace...$192.00 -
Wossner - 8017DC - Piston Kit - 71.95 mm - KTM
Wossner
$192.00Wossner - 09104712 - Piston Kit - 71.95 mm - KTMFeaturesOptimized machining for lightness, as well as maintained strength in key areas such as crown and skirt wall cross sectionForged from aerospace...$192.00 -
Wossner - 8017DA - Piston Kit - 71.93 mm - Fits 1996-2003 KTM 300 EGS/EXC/MXC
Wossner
$192.00Wossner - 09104710 - Piston Kit - 71.93 mm - KTMFeaturesOptimized machining for lightness, as well as maintained strength in key areas such as crown and skirt wall cross sectionForged from aerospace...$192.00 -
Wossner - 8306DA - Piston Kit - 43.45 mm - Fits 2018-2026 Yamaha YZ65
Wossner
$112.00Wossner - 09105590 - Piston Kit - 43.45 mm - YamahaFeaturesOptimized machining for lightness, as well as maintained strength in key areas such as crown and skirt wall cross sectionForged from...$112.00 -
Wossner - 8001DA - Piston Kit - 66.34 mm - Honda
Wossner
$152.00Wossner - 09104684 - Piston Kit - 66.34 mm - HondaFeaturesOptimized machining for lightness, as well as maintained strength in key areas such as crown and skirt wall cross sectionForged from...$152.00 -
Wossner - 8203DA - Piston Kit - 69.94 mm - Fits Kawasaki 1980-1982 KDX250, 1978-1986 KX250
Wossner
$152.00Wossner - 09105575 - Piston Kit - 69.94 mm - KawasakiFeaturesOptimized machining for lightness, as well as maintained strength in key areas such as crown and skirt wall cross sectionForged from...$152.00 -
Wossner - 8179D200 - Piston Kit - 71.94 mm - Yamaha
Wossner
$182.00Wossner - 09105571 - Piston Kit - 71.94 mm - YamahaFeaturesOptimized machining for lightness, as well as maintained strength in key areas such as crown and skirt wall cross sectionForged from...$182.00 -
Wossner - 8179D050 - Piston Kit - 70.44 mm - Yamaha
Wossner
$152.00Wossner - 09105570 - Piston Kit - 70.44 mm - YamahaFeaturesOptimized machining for lightness, as well as maintained strength in key areas such as crown and skirt wall cross sectionForged from...$152.00 -
Wossner - 8059DB - Piston Kit - 66.35 mm - Suzuki
Wossner
$152.00Wossner - 09105496 - Piston Kit - 66.35 mm - SuzukiFeaturesOptimized machining for lightness, as well as maintained strength in key areas such as crown and skirt wall cross sectionForged from...$152.00 -
Works Connection - 24-492 - Engine Plug - Red - Honda
Works Connection
$31.95Works Connection - 09500855 - Engine Plug - Red - HondaFeaturesSimple positive installation with an Allen wrenchSet of two plugs replaces the stock plugsPolished to a mirror finish prior to...$31.95 -
Wossner - P4027 - Connecting Rod Kit - Fits Honda 2009-2016 CRF450R, 2017-2020 CRF450RX
Wossner
$174.00Wossner - 09230442 - Connecting Rod Kit - HondaFeaturesDesigned to fit OEM bearing and crank pinGerman engineeredFour stroke rods include bronze-bushed small end for reduced friction and improved...$174.00 -
Wossner - P4009 - Connecting Rod Kit - Arctic Cat | Kawasaki | Suzuki - Fits 2000-2023 Suzuki DR-Z400
Wossner
$174.00Wossner - 09230435 - Connecting Rod Kit - Arctic Cat | Kawasaki | SuzukiFeaturesDesigned to fit OEM bearing and crank pinGerman engineeredFour stroke rods include bronze-bushed small end for reduced...$174.00 -
Wossner - P4026 - Connecting Rod Kit - Fits 2002-2008 Honda CRF450R
Wossner
$174.00Wossner - 09230441 - Connecting Rod Kit - HondaFeaturesDesigned to fit OEM bearing and crank pinGerman engineeredFour stroke rods include bronze-bushed small end for reduced friction and improved...$174.00 -
Works Connection - 24-608 - Engine Plug - Red - Fits Honda 2019-2024 CRF250F, 2018-2024 CRF250R, 2019-2024 CRF250RX
Works Connection
$46.95Works Connection - 09500879 - Engine Plug - Red - HondaFeaturesSimple positive installation with an Allen wrenchSet of two plugs (unless noted) replaces the stock plugsPolished to a mirror finish...$46.95 -
Works Connection - 24-452 - Engine Plug - Black - Gas Gas/Husqvarna/KTM
Works Connection
$30.95Works Connection - 09500979 - Engine Plug - Black - Gas Gas/Husqvarna/KTMFeaturesSimple positive installation with an Allen wrenchSet of two plugs (unless noted) replaces the stock plugsPolished to a...$30.95 -
Works Connection - 24-450 - Engine Plug - Blue - Gas Gas/Husqvarna/KTM - Multiple Gas Gas/Husqvarna/KTM Models
Works Connection
$30.95Works Connection - 09500977 - Engine Plug - Blue - Gas Gas/Husqvarna/KTMFeaturesSimple positive installation with an Allen wrenchSet of two plugs (unless noted) replaces the stock plugsPolished to a...$30.95 -
Works Connection - 24-454 - Engine Plug - Silver - Gas Gas/Husqvarna/KTM
Works Connection
MSRP: $30.95$29.95Works Connection - 09500981 - Engine Plug - Silver - Gas Gas/Husqvarna/KTMFeaturesSimple positive installation with an Allen wrenchSet of two plugs (unless noted) replaces the stock plugsPolished to...MSRP: $30.95$29.95 -
Wossner - N1006 - Top End Bearing - 14 mm x 18 mm x 16.5 mm - Multiple Models
Wossner
$18.50Wossner - 09240447 - Top End Bearing - 14 mm x 18 mm x 16.5 mmFeaturesPrecision manufactured from quality materialsSpecs$18.50 -
Works Connection - 24-451 - Engine Plug - Red - Gas Gas/Husqvarna/KTM
Works Connection
$30.95Works Connection - 09500978 - Engine Plug - Red - Gas Gas/Husqvarna/KTMFeaturesSimple positive installation with an Allen wrenchSet of two plugs (unless noted) replaces the stock plugsPolished to a...$30.95 -
Wossner - CS2009 - Crankshaft Assembly - Fits 1990-2007 Honda CR125R
Wossner
$342.00Wossner - 09210909 - Crankshaft Assembly - HondaFeaturesStandard replacement crankshaft assembly unless notedSpecs$342.00 -
Wossner - CS2071 - Crankshaft Assembly - Fits 2018-2026 Yamaha YZ65
Wossner
$262.00Wossner - 09210916 - Crankshaft Assembly - YamahaFeaturesStandard replacement crankshaft assembly unless notedSpecs$262.00 -
Wossner - CS2012 - Crankshaft Assembly - Husaberg | Husqvarna | KTM - Multiple Husqvarna/KTM Models
Wossner
$342.00Wossner - 09210880 - Crankshaft Assembly - Husaberg | Husqvarna | KTMFeaturesStandard replacement crankshaft assembly unless notedSpecs$342.00 -
Wossner - CS2055 - Crankshaft Assembly - Gas Gas | Husqvarna | KTM - Fits 2021-2023 Gas Gas MC 65, 2009-2023 KTM 65 SX, 2014-2023 Husqvarna TC 65
Wossner
$282.00Wossner - 09210913 - Crankshaft Assembly - Gas Gas | Husqvarna | KTMFeaturesStandard replacement crankshaft assembly unless notedSpecs$282.00 -
Wsm - 010-001 - Valve Spring Retainer - Sea Doo
Wsm
$16.46Wsm - 09263433 - Valve Spring Retainer - Sea DooFeaturesReplacement Part for OEM Number(s):420254281,420254283,711254280Specs$16.46 -
Wossner - WBC8147A - Cylinder - 47.00 mm - KTM | Husqvarna | GasGas 85 - Fits 2021-2025 Gas Gas MC 85, 2018-2025 KTM 85 SX, 2018-2025 Husqvarna TC 85
Wossner
$452.00Wossner - 09311110 - Cylinder - 47.00 mm - KTM | Husqvarna | GasGas 85FeaturesNickel silicon plated bore for durabilityDiamond honed for precise sizingCylinder bore surface provides high oil...$452.00 -
Wsm - 007-399-05 - Head Gasket - Sea Doo
Wsm
$107.64Wsm - 09347516 - Head Gasket - Sea DooFeaturesReplacement Part for OEM Number(s):290950770,420950770,420950771,420950772Specs$107.64 -
Wsm - 007-588-01 - Cam Chain Plug Gasket - Sea Doo
Wsm
$1.47Wsm - 09347504 - Cam Chain Plug Gasket - Sea DooFeaturesReplacement Part for OEM Number(s):290430623,420430623,420430624Specs$1.47 -
Wossner - 8217DB - Piston Kit - 66.36 mm - Yamaha
Wossner
$182.00Wossner - 09106642 - Piston Kit - 66.36 mm - YamahaFeaturesOptimized machining for lightness, as well as maintained strength in key areas such as crown and skirt wall cross sectionForged from...$182.00 -
Wossner - P2069 - Connecting Rod Kit - Fits Beta 2013-2017 250/300 RR 2T, 2013-2017 Xtrainer 300 2T
Wossner
$122.00Wossner - 09230687 - Connecting Rod Kit - BetaFeaturesShot peened for ultimate strength and long life8620 forged alloyFEA (computer simulation) used to fine tune every designGerman engineeredFor best...$122.00 -
Wossner - P2072-R - Connecting Rod Kit - Yamaha
Wossner
$242.00Wossner - 09230686 - Connecting Rod Kit - YamahaFeaturesShot peened for ultimate strength and long life8620 forged alloyFEA (computer simulation) used to fine tune every designGerman engineeredFor...$242.00 -
Wsm - 010-862-14 - Top End Kit - 100.96 mm - Sea-Doo
Wsm
$776.78Wsm - 09031734 - Top End Kit - 100.96 mm - Sea-DooFeaturesSpecsTypeTop End$776.78 -
Wossner - 8303DB - Piston Kit - 53.94 mm - Sherco
Wossner
$132.00Wossner - 09106639 - Piston Kit - 53.94 mm - ShercoFeaturesOptimized machining for lightness, as well as maintained strength in key areas such as crown and skirt wall cross sectionForged from...$132.00 -
Wossner - 8217DA - Piston Kit - 66.35 mm - Fits Yamaha 1999-2026 YZ250, 2016-2023 YZ250X
Wossner
$182.00Wossner - 09106641 - Piston Kit - 66.35 mm - YamahaFeaturesOptimized machining for lightness, as well as maintained strength in key areas such as crown and skirt wall cross sectionForged from...$182.00 -
Wossner - 8229D050 - Piston Kit - 89.42 mm - Honda
Wossner
$192.00Wossner - 09106643 - Piston Kit - 89.42 mm - HondaFeaturesOptimized machining for lightness, as well as maintained strength in key areas such as crown and skirt wall cross sectionForged from...$192.00
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.