Dirt Bike Engine
5140 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 - 711063E - Complete Gasket Set - Arctic Cat
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$50.08Vertex - 711063E - Complete Gasket Set - Arctic CatFeaturesFit most current and many non-current engines, including Sachs, JLO, Hirth, CCW, Kohler and XenoahDesigned to replace OEM gaskets exactlyKit...$50.08 -
Vertex - 710266 - Full Top End Set - Arctic Cat
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$91.63Vertex - 710266 - Full Top End Set - Arctic CatFeaturesFit most current and many non-current engines, including Sachs, JLO, Hirth, CCW, Kohler and XenoahDesigned to replace OEM gaskets exactlyMany...$91.63 -
Vertex - 710227 - Full Top End Set - Arctic Cat
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$68.20Vertex - 710227 - Full Top End Set - Arctic CatFeaturesFit most current and many non-current engines, including Sachs, JLO, Hirth, CCW, Kohler and XenoahDesigned to replace OEM gaskets exactlyMany...$68.20 -
Vertex - 710221 - Full Top End Set - Ski-Doo
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$90.87Vertex - 710221 - 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...$90.87 -
Vertex - 711171A - Complete Gasket Set - Yamaha
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$68.92Vertex - 711171A - Complete Gasket Set - YamahaFeaturesFit most current and many non-current engines, including Sachs, JLO, Hirth, CCW, Kohler and XenoahDesigned to replace OEM gaskets exactlyKit...$68.92 -
Vertex - 710208 - Full Top End Set - Polaris
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$66.92Vertex - 710208 - 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...$66.92 -
Vertex - 710210 - Full Top End Set - Ski-Doo
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$46.13Vertex - 710210 - 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...$46.13 -
Vertex - 710238 - Full Top End Set - Polaris
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$58.47Vertex - 710238 - 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...$58.47 -
Vertex - 710231 - Full Top End Set - Polaris
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$83.78Vertex - 710231 - 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...$83.78 -
Vertex - 710199 - Full Top End Set - Polaris
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$101.87Vertex - 710199 - 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...$101.87 -
Vertex - 710212 - Full Top End Set - Ski-Doo
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$65.25Vertex - 710212 - 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...$65.25 -
Vertex - 710201 - Full Top End Set - Yamaha
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$82.25Vertex - 710201 - 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...$82.25 -
Vertex - 710195 - Full Top End Set - Ski-Doo
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$19.78Vertex - 710195 - 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...$19.78 -
Out of stock
Vertex - 710193 - Full Top End Set - Arctic Cat
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$85.62Vertex - 710193 - Full Top End Set - Arctic CatFeaturesFit most current and many non-current engines, including Sachs, JLO, Hirth, CCW, Kohler and XenoahDesigned to replace OEM gaskets exactlyMany...$85.62 -
Vertex - 710191 - Full Top End Set - Polaris
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$82.25Vertex - 710191 - 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...$82.25 -
Vertex - 710205 - Full Top End Set - Polaris
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$111.17Vertex - 710205X - 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...$111.17 -
Vertex - 710185A - Full Top End Set - Polaris
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$64.70Vertex - 710185A - 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...$64.70 -
Vertex - 710196 - Full Top End Set - Ski-Doo
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$40.25Vertex - 710196 - 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...$40.25 -
Vertex - 710173 - Full Top End Set - Polaris
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$39.55Vertex - 710173 - 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...$39.55 -
Vertex - 710165 - Full Top End Set - Ski-Doo
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$52.78Vertex - 710165 - 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...$52.78 -
Vertex - 710142 - Full Top End Set - Yamaha
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$40.25Vertex - 710142 - 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...$40.25 -
Vertex - 710179 - Full Top End Set - Arctic Cat
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$49.58Vertex - 710179 - Full Top End Set - Arctic CatFeaturesFit most current and many non-current engines, including Sachs, JLO, Hirth, CCW, Kohler and XenoahDesigned to replace OEM gaskets exactlyMany...$49.58 -
Vertex - 710057 - Full Top End Set - Arctic Cat
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$34.88Vertex - 710057 - Full Top End Set - Arctic CatFeaturesFit most current and many non-current engines, including Sachs, JLO, Hirth, CCW, Kohler and XenoahDesigned to replace OEM gaskets exactlyMany...$34.88 -
Vertex - 710168 - Full Top End Set - Yamaha
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$40.25Vertex - 710168 - 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...$40.25 -
Vertex - 710023C - Full Top End Set - Ski-Doo
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$44.72Vertex - 710023C - 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...$44.72 -
Vertex - 710110C - Full Top End Set - Polaris
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$46.13Vertex - 710110C - 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...$46.13 -
Vertex - 710063B - Full Top End Set - Arctic Cat
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$41.12Vertex - 710063B - Full Top End Set - Arctic CatFeaturesFit most current and many non-current engines, including Sachs, JLO, Hirth, CCW, Kohler and XenoahDesigned to replace OEM gaskets exactlyMany...$41.12 -
Vertex - 22581B - Piston Kit - 66.35 mm - Honda CR250R - Fits 1997-2001 Honda CR250R
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$235.95Vertex - 09101033 - 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...$235.95 -
Vertex - 23329B - Piston Kit - 88.95 mm - Beta | KTM - Fits 2003-2007 KTM 450 EXC
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$302.95Vertex - 09101007 - Piston Kit - 88.95 mm - Beta | KTMFeaturesThe piston skirt is treated with a Molybdenum Disulphite coating for a faster break-in time and increased piston lifeForged replica...$302.95 -
Vertex - 22499B - Piston Kit - 46.95 mm - Honda CR80R/RB - Fits 1990-2002 Honda CR80R
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$118.95Vertex - 09101023 - Piston Kit - 46.95 mm - Honda CR80R/RBFeaturesPiston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston lifeGravity-cast...$118.95 -
Vertex - 710089 - Full Top End Set - John Deere
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$34.88Vertex - 09340536 - Full Top End Set - John DeereFeaturesFit most current and many non-current engines, including Sachs, JLO, Hirth, CCW, Kohler and XenoahDesigned to replace OEM gaskets exactlyMany...$34.88 -
Vertex - 22459B - Piston Kit - 67.45 mm - KTM 250 EXC/SX - Fits 1996-1999 KTM 250 SX/EXC
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$218.95Vertex - 09100995 - Piston Kit - 67.45 mm - KTM 250 EXC/SXFeaturesPiston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston lifeGravity-cast...$218.95 -
Vertex - 23335A - Piston Kit - 57.95 mm - Fits Yamaha 2005-2021 YZ125, 2020-2021 YZ125X
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$197.95Vertex - 09100967 - Piston Kit - 57.95 mm - YamahaFeaturesThe piston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break in time and increased piston lifeCast piston is...$197.95 -
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
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.