Dirt Bike Engine
4639 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
Vertex - 710225 - Full Top End Set - Arctic Cat
Vertex
$54.58Vertex - 710225 - 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...$54.58 -
Out of stock
Vertex - 710206 - Full Top End Set - Polaris
Vertex
$100.03Vertex - 710206 - 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...$100.03 -
Out of stock
Vertex - 710063E - Full Top End Set - Arctic Cat
Vertex
$40.25Vertex - 710063E - 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...$40.25 -
Out of stock
Vertex - 710171A - Full Top End Set - Yamaha
Vertex
$58.62Vertex - 710171A - 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...$58.62 -
Out of stock
Vertex - 711200 - Complete Gasket Set - Yamaha
Vertex
$96.13Vertex - 711200 - Complete Gasket Set - YamahaFeaturesFit most current and many non-current engines, including Sachs, JLO, Hirth, CCW, Kohler and XenoahDesigned to replace OEM gaskets exactlyKit...$96.13 -
Out of stock
Vertex - 711142C - Complete Gasket Set - Yamaha
Vertex
$53.87Vertex - 711142C - Complete Gasket Set - YamahaFeaturesFit most current and many non-current engines, including Sachs, JLO, Hirth, CCW, Kohler and XenoahDesigned to replace OEM gaskets exactlyKit...$53.87 -
Out of stock
Vertex - 710026 - Full Top End Set - Moto-Ski/Ski-Doo
Vertex
$34.88Vertex - 710026X - Full Top End Set - Moto-Ski/Ski-DooFeaturesFit most current and many non-current engines, including Sachs, JLO, Hirth, CCW, Kohler and XenoahDesigned to replace OEM gaskets...$34.88 -
Out of stock
Vertex - 710061 - Full Top End Set - Arctic Cat
Vertex
$40.25Vertex - 710061 - 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...$40.25 -
Out of stock
Vertex - 710032 - Full Top End Set - Arctic Cat/Kawasaki
Vertex
$40.25Vertex - 710032 - Full Top End Set - Arctic Cat/KawasakiFeaturesFit most current and many non-current engines, including Sachs, JLO, Hirth, CCW, Kohler and XenoahDesigned to replace OEM gaskets...$40.25 -
Out of stock
Vertex - 22541B - Piston Kit - 77.95 mm - KTM 360 EXC/MXC/SX | KTM 380 EXC/MXC/SX - Fits 1996-1997 KTM 360 EXC
Vertex
$302.95Vertex - 09101003 - Piston Kit - 77.95 mm - KTM 360 EXC/MXC/SX | KTM 380 EXC/MXC/SXFeaturesPiston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased...$302.95 -
Out of stock
Vertex - 22532B - Piston Kit - 54.20 mm - KTM 125 EXC/SX - Fits 1998-2000 KTM 125 SX/EXC
Vertex
$197.95Vertex - 09100987 - Piston Kit - 54.20 mm - KTM 125 EXC/SXFeaturesPiston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston lifeGravity-cast...$197.95 -
Out of stock
Vertex - 22520B - Piston Kit - 53.94 mm - Yamaha YZ125 - Fits 1998-2001 Yamaha YZ125
Vertex
$171.95Vertex - 09100964 - Piston Kit - 53.94 mm - Yamaha YZ125FeaturesPiston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston lifeGravity-cast...$171.95 -
Out of stock
Vertex - 22646B - Piston Kit - 66.35 mm - Suzuki RM250 - Fits 2000-2002 Suzuki RM250
Vertex
$235.95Vertex - 09100951 - 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...$235.95 -
Out of stock
Vertex - 22998B - Piston Kit - 53.96 mm - Suzuki RM125 - Fits 2004-2007 Suzuki RM125
Vertex
$184.95Vertex - 09100946 - 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 -
Out of stock
Vertex - 710222 - Full Top End Set - Ski-Doo
Vertex
$90.87Vertex - 09340524 - 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 -
Out of stock
Vertex - 710073 - Full Top End Set - Polaris
Vertex
$40.95Vertex - 09340534 - 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...$40.95 -
Out of stock
Vertex - 23383A - Piston Kit - 55.95 mm - KTM 144SX/150SX/150XC - Fits 2007-2008 KTM 144 SX
Vertex
$217.95Vertex - 09100990 - Piston Kit - 55.95 mm - KTM 144SX/150SX/150XCFeaturesPiston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston...$217.95 -
Out of stock
Vertex - 710069 - Full Top End Set - Polaris
Vertex
$24.12Vertex - 09340531 - 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...$24.12 -
Out of stock
Vertex - 22154B - Piston Kit - 67.95 mm - Yamaha YZ250/WR250 - Fits 1991-1995 Yamaha WR250
Vertex
$208.95Vertex - 09100968 - Piston Kit - 67.95 mm - Yamaha YZ250/WR250FeaturesPiston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston...$208.95 -
Out of stock
Vertex - 710306 - Full Top End Set - Polaris
Vertex
$92.83Vertex - 09341945 - 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...$92.83 -
Out of stock
Vertex - 711298 - Complete Gasket Set - Polaris
Vertex
$160.80Vertex - 09341282 - 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 -
Out of stock
Vertex - 711262 - Complete Gasket Set - Arctic Cat
Vertex
$108.57Vertex - 09340313 - Complete Gasket Set - Arctic CatFeaturesFit most current and many non-current engines, including Sachs, JLO, Hirth, CCW, Kohler and XenoahDesigned to replace OEM gaskets...$108.57 -
Out of stock
Vertex - 23630B - Piston Kit - 66.35 mm - Gas Gas | Husaberg | Husqvarna | KTM
Vertex
$213.95Vertex - 09102067 - Piston Kit - 66.35 mm - Gas Gas | Husaberg | Husqvarna | KTMFeaturesPiston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased...$213.95 -
Out of stock
Vertex - 710305 - Full Top End Set - Polaris
Vertex
$108.20Vertex - 09341944 - 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...$108.20 -
Out of stock
Vertex - 23381A - Piston Kit - 94.94 mm - Fits 2008-2011 KTM 530 EXC
Vertex
$315.95Vertex - 09102557 - Piston Kit - 94.94 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...$315.95 -
Out of stock
Vertex - 23457B - Piston Kit - 71.95 mm - Husqvarna WR300
Vertex
$260.95Vertex - 09102564 - Piston Kit - 71.95 mm - Husqvarna WR300FeaturesPiston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston lifeGravity-cast...$260.95 -
Out of stock
Vertex - 23630A - Piston Kit - 66.34 mm - Gas Gas | Husaberg | Husqvarna | KTM - Multiple Gas Gas/Husqvarna/KTM Models
Vertex
$217.95Vertex - 09102066 - Piston Kit - 66.34 mm - Gas Gas | Husaberg | Husqvarna | KTMFeaturesPiston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased...$217.95 -
Out of stock
Vertex - 22601B - Piston Kit - 66.35 mm - Husqvarna CR/WR 250 - Fits 1998-2012 Husqvarna CR/WR 250
Vertex
$218.95Vertex - 09102544 - Piston Kit - 66.35 mm - Husqvarna CR/WR 250FeaturesPiston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston...$218.95 -
Out of stock
Vertex - 72065K - Piston Circlips - Multiple Gas Gas/Husqvarna/KTM Models
Vertex
$3.95Vertex - 09130058 - Piston CirclipsFeaturesSpecsApplicationPistonProdu$3.95 -
Out of stock
Vertex - 715380 - Wrist Pin
Vertex
$16.95Vertex - 09130042 - 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...$16.95 -
Out of stock
Vertex - 23235A - Piston Kit - 75.96 mm - Fits KTM 2007-2012 250 EXC-F, 2006-2012 250 SX-F, 2006-2014 250 XC-F/XCF-W
Vertex
$302.95Vertex - 09101004 - Piston Kit - 75.96 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 -
Out of stock
Vertex - 23381B - Piston Kit - 94.95 mm - KTM
Vertex
$327.95Vertex - 09101020 - 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...$327.95 -
Out of stock
Vertex - 22877B - Piston Kit - 47.95 mm - Suzuki RM85/L - Fits 2002-2021 Suzuki RM85
Vertex
$127.95Vertex - 09100941 - Piston Kit - 47.95 mm - Suzuki RM85/LFeaturesPiston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston lifeGravity-cast...$127.95 -
Out of stock
Vertex - 23641B - Piston Kit - 87.97 mm - Husaberg | Husqvarna | KTM
Vertex
$302.95Vertex - 09102568 - 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 -
Out of stock
Vertex - 23564B - Piston Kit - 76.96 mm - Suzuki RM-Z250
Vertex
$256.95Vertex - 09102085 - Piston Kit - 76.96 mm - Suzuki RM-Z250FeaturesThe piston skirt is treated with a Molybdenum Disulphite coating for a faster break-in time and increased piston lifeForged replica...$256.95 -
Out of stock
Vertex - 23646A - Piston Kit - 76.95 mm - Kawasaki KX250F - Fits 2011-2014 Kawasaki KX250F
Vertex
$256.95Vertex - 09102055 - Piston Kit - 76.95 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 -
Out of stock
Vertex - 22995B - Piston Kit - 53.93 mm - Honda CR125R - Fits 2004 Honda CR125R
Vertex
$158.95Vertex - 09102034 - Piston Kit - 53.93 mm - Honda CR125RFeaturesPiston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston lifeGravity-cast...$158.95 -
Out of stock
Vertex - 23205500 - Piston Kit - 52.95 mm - Fits 2002-2016 Suzuki RM85 Supermini
Vertex
$165.95Vertex - 09102076 - Piston Kit - 52.95 mm - SuzukiFeaturesThe piston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break in time and increased piston lifeCast piston is...$165.95 -
Out of stock
Vertex - 22803B - Piston Kit - 48.45 mm - Kawasaki KX85 - Fits 2001-2016 Kawasaki KX85
Vertex
$131.95Vertex - 09101051 - Piston Kit - 48.45 mm - Kawasaki KX85FeaturesPiston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston lifeGravity-cast...$131.95 -
Out of stock
Vertex - 23404A - Piston Kit - 97.96 mm - Yamaha YZ/WR450F - Fits 2003-2014 Yamaha WR450F
Vertex
$315.95Vertex - 09101963 - Piston Kit - 97.96 mm - Yamaha YZ/WR450FFeaturesThe piston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break in time and increased piston...$315.95
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.