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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Vertex - 22584B - Piston Kit - 66.35 mm - Yamaha YZ250/X
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$183.95Vertex - 09100970 - Piston Kit - 66.35 mm - Yamaha YZ250/XFeaturesPiston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston lifeGravity-cast...$183.95 -
Vertex - 22982B - Piston Kit - 76.96 mm - Kawasaki | Suzuki
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$256.95Vertex - 09100953 - Piston Kit - 76.96 mm - Kawasaki | SuzukiFeaturesThe piston skirt is treated with a Molybdenum Disulphite coating for a faster break-in time and increased piston lifeForged...$256.95 -
Vertex - 710106B - Full Top End Set - JLO
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$40.25Vertex - 09340528 - Full Top End Set - JLOFeaturesFit most current and many non-current engines, including Sachs, JLO, Hirth, CCW, Kohler and XenoahDesigned to replace OEM gaskets exactlyMany kit now...$40.25 -
Vertex - 22386B - Piston Kit - 66.35 mm - Suzuki RM250 - Fits 1996-1997 Suzuki RM250
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$230.95Vertex - 09100948 - Piston Kit - 66.35 mm - Suzuki RM250FeaturesPiston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston lifeGravity-cast...$230.95 -
Vertex - 719115 - Exhaust Valve Gasket - Ski-Doo
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$11.92Vertex - 09340860 - Exhaust Valve Gasket - Ski-DooFeaturesContains exhaust valve gaskets, O-rings and seals where requiredSpecs$11.92 -
Vertex - 719111 - Exhaust Valve Gasket - Ski-Doo
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$11.13Vertex - 09340856 - Exhaust Valve Gasket - Ski-DooFeaturesContains exhaust valve gaskets, O-rings and seals where requiredSpecs$11.13 -
Vertex - 719113 - Exhaust Valve Gasket - Ski-Doo
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$11.13Vertex - 09340858 - Exhaust Valve Gasket - Ski-DooFeaturesContains exhaust valve gaskets, O-rings and seals where requiredSpecs$11.13 -
Vertex - 611110 - Complete Gasket Set - Sea-Doo
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$92.30Vertex - 09340725 - Complete Gasket Set - Sea-DooFeaturesIncludes all head, base, intake, exhaust gaskets and O-rings or oil seals, plus crankshaft end seals and power valve gasketsMade in the...$92.30 -
Vertex - 711302 - Complete Gasket Set - Ski-Doo
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$189.97Vertex - 09341577 - Complete Gasket Set - Ski-DooFeaturesFit most current and many non-current engines, including Sachs, JLO, Hirth, CCW, Kohler and XenoahDesigned to replace OEM gaskets exactlyKit...$189.97 -
Vertex - 711303 - Complete Gasket Set - Ski-Doo
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$179.92Vertex - 09341575 - Complete Gasket Set - Ski-DooFeaturesFit most current and many non-current engines, including Sachs, JLO, Hirth, CCW, Kohler and XenoahDesigned to replace OEM gaskets exactlyKit...$179.92 -
Vertex - 23119B - Piston Kit - 53.94 mm - Yamaha YZ125/X - Fits Yamaha 2005-2021 YZ125, 2020-2021 YZ125X
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$156.95Vertex - 09100966 - Piston Kit - 53.94 mm - Yamaha YZ125/XFeaturesPiston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston lifeGravity-cast...$156.95 -
Vertex - 710147B - Full Top End Set - Yamaha
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$48.03Vertex - 09340539 - Full Top End Set - YamahaFeaturesFit most current and many non-current engines, including Sachs, JLO, Hirth, CCW, Kohler and XenoahDesigned to replace OEM gaskets exactlyMany kit...$48.03 -
Vertex - 710259 - Full Top End Set - Ski-Doo
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$100.08Vertex - 09340553 - Full Top End Set - Ski-DooFeaturesFit most current and many non-current engines, including Sachs, JLO, Hirth, CCW, Kohler and XenoahDesigned to replace OEM gaskets exactlyMany kit...$100.08 -
Vertex - 710303 - Full Top End Set - Ski-Doo
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$97.17Vertex - 09341574 - Full Top End Set - Ski-DooFeaturesFit most current and many non-current engines, including Sachs, JLO, Hirth, CCW, Kohler and XenoahDesigned to replace OEM gaskets exactlyMany kit...$97.17 -
Vertex - 710261 - Full Top End Set - Ski-Doo
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$75.95Vertex - 09340308 - Full Top End Set - Ski-DooFeaturesFit most current and many non-current engines, including Sachs, JLO, Hirth, CCW, Kohler and XenoahDesigned to replace OEM gaskets exactlyMany kit...$75.95 -
Vertex - 711289 - Complete Gasket Set - Ski-Doo
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$268.28Vertex - 09341953 - Complete Gasket Set - Ski-DooFeaturesFit most current and many non-current engines, including Sachs, JLO, Hirth, CCW, Kohler and XenoahDesigned to replace OEM gaskets exactlyKit...$268.28 -
Vertex - 711269 - Complete Gasket Set - Yamaha
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$216.12Vertex - 09340310 - Complete Gasket Set - YamahaFeaturesFit most current and many non-current engines, including Sachs, JLO, Hirth, CCW, Kohler and XenoahDesigned to replace OEM gaskets exactlyKit...$216.12 -
Vertex - 711306 - Complete Gasket Set - Polaris
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$160.80Vertex - 09341948 - Complete Gasket Set - PolarisFeaturesFit most current and many non-current engines, including Sachs, JLO, Hirth, CCW, Kohler and XenoahDesigned to replace OEM gaskets exactlyKit...$160.80 -
Vertex - 711221 - Complete Gasket Set - Ski-Doo
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$125.63Vertex - 09340307 - Complete Gasket Set - Ski-DooFeaturesFit most current and many non-current engines, including Sachs, JLO, Hirth, CCW, Kohler and XenoahDesigned to replace OEM gaskets exactlyKit...$125.63 -
Vertex - 710253 - Full Top End Set - Polaris
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$87.83Vertex - 09340298 - Full Top End Set - PolarisFeaturesFit most current and many non-current engines, including Sachs, JLO, Hirth, CCW, Kohler and XenoahDesigned to replace OEM gaskets exactlyMany kit...$87.83 -
Vertex - 711307 - Complete Gasket Set - Polaris
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$163.22Vertex - 09341949 - Complete Gasket Set - PolarisFeaturesFit most current and many non-current engines, including Sachs, JLO, Hirth, CCW, Kohler and XenoahDesigned to replace OEM gaskets exactlyKit...$163.22 -
Vertex - 22813CD - Piston Kit - 39.47 mm - Fits 2001-2008 KTM 50 SX
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$100.95Vertex - 09102064 - Piston Kit - 39.47 mm - KTMFeaturesPiston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston lifeGravity-cast aluminum...$100.95 -
Vertex - 23646B - Piston Kit - 76.96 mm - Kawasaki KX250F
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$256.95Vertex - 09102056 - Piston Kit - 76.96 mm - Kawasaki KX250FFeaturesThe piston skirt is treated with a Molybdenum Disulphite coating for a faster break-in time and increased piston lifeForged replica...$256.95 -
Vertex - 23621200 - Piston Kit - 54.44 mm - Kawasaki KX100 - Fits 1999-2021 Kawasaki KX100
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$188.95Vertex - 09102054 - Piston Kit - 54.44 mm - Kawasaki KX100FeaturesPiston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston lifeGravity-cast...$188.95 -
Vertex - 590288000001 - Piston Ring Set - 88.00 mm OD - For Replica and High Compression Piston
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$87.10Vertex - 09120348 - Piston Ring Set - 88.00 mm OD - For Replica and High Compression PistonFeaturesNitride coated or chrome plated, increasing wear resistance and extending durabilitySpecs$87.10 -
Vertex - 55910006640 - Piston Ring - 66.40 mm OD - For Replica Piston
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$55.60Vertex - 09120347 - Piston Ring - 66.40 mm OD - For Replica PistonFeaturesNitride coated or chrome plated, increasing wear resistance and extending durabilitySpecs$55.60 -
Vertex - 72050K - Piston Circlips - 85/105CC
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$4.15Vertex - 09130048 - Piston Circlips - 85/105CCFeaturesSpecsUnitsPairRi$4.15 -
Vertex - 711127 - Wrist Pin - Multiple Models
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$11.50Vertex - 09130019 - Wrist PinFeaturesCoating wrist pins with a nitride coating is advantageous because it allows the desired surface hardness to be obtained without quenching and possibly distorting...$11.50 -
Vertex - 22387B - Piston Kit - 66.35 mm - Honda CR250R - Fits 1995-1996 Honda CR250R
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$208.95Vertex - 09101032 - Piston Kit - 66.35 mm - Honda CR250RFeaturesPiston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston lifeGravity-cast...$208.95 -
Vertex - 22863B - Piston Kit - 47.45 mm - Honda CR85R/RB - Fits 2003-2007 Honda CR85R/RB
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$116.95Vertex - 09101024 - Piston Kit - 47.45 mm - Honda CR85R/RBFeaturesPiston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston lifeGravity-cast...$116.95 -
Vertex - 23379B - Piston Kit - 94.95 mm - Fits 2008-2011 KTM 450 EXC/EXC-R/XC-W
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$302.95Vertex - 09101012 - Piston Kit - 94.95 mm - KTMFeaturesThe piston skirt is treated with a Molybdenum Disulphite coating for a faster break-in time and increased piston lifeForged replica piston is a...$302.95 -
Vertex - 22909B - Piston Kit - 66.36 mm - KTM 250SX - Fits 2003-2004 KTM 250 SX
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$223.95Vertex - 09100998 - Piston Kit - 66.36 mm - KTM 250SXFeaturesPiston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston lifeGravity-cast...$223.95 -
Vertex - 22805B - Piston Kit - 76.95 mm - Yamaha YZ250F
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$256.95Vertex - 09100971 - Piston Kit - 76.95 mm - Yamaha YZ250FFeaturesThe piston skirt is treated with a Molybdenum Disulphite coating for a faster break-in time and increased piston lifeForged replica...$256.95 -
Vertex - 22925B - Piston Kit - 63.95 mm - KTM 200SX - Fits KTM 1998-2004 200 SX, 1998-2003 200 MXC, 2006-2009 200 XC
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$242.95Vertex - 09100992 - Piston Kit - 63.95 mm - KTM 200SXFeaturesPiston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston lifeGravity-cast...$242.95 -
Vertex - 22652B - Piston Kit - 53.96 mm - Suzuki RM125 - Fits 2000-2003 Suzuki RM125
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$184.95Vertex - 09100945 - Piston Kit - 53.96 mm - Suzuki RM125FeaturesPiston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston lifeGravity-cast...$184.95 -
Vertex - 23383B - Piston Kit - 55.96 mm - KTM 144SX/150SX/150XC
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$208.95Vertex - 09102558 - Piston Kit - 55.96 mm - KTM 144SX/150SX/150XCFeaturesPiston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston...$208.95 -
Vertex - 23711B - Piston Kit - 87.97 mm - Husaberg | Husqvarna | KTM
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$302.95Vertex - 09102594 - Piston Kit - 87.97 mm - Husaberg | Husqvarna | KTMFeaturesThe piston skirt is treated with a Molybdenum Disulphite coating for a faster break-in time and increased piston...$302.95 -
Vertex - 22584A - Piston Kit - 66.34 mm - Yamaha YZ250/X - Fits 1999-2022 Yamaha YZ250/X
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$183.95Vertex - 09102542 - Piston Kit - 66.34 mm - Yamaha YZ250/XFeaturesPiston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston lifeGravity-cast...$183.95 -
Vertex - 22356A - Piston Kit - 67.94 mm - Yamaha YZ/WR250 - Fits 1996-1997 Yamaha WR250/YZ250
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$208.95Vertex - 09102541 - Piston Kit - 67.94 mm - Yamaha YZ/WR250FeaturesPiston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston lifeGravity-cast...$208.95 -
Vertex - 23335B - Piston Kit - 57.96 mm - Yamaha
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$189.95Vertex - 09102117 - Piston Kit - 57.96 mm - YamahaFeaturesThe piston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break in time and increased piston lifeCast piston is...$189.95
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.