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 - VTK22806B - Top End Piston Kit - 53.94 mm - Yamaha YZ125 - Fits 2002-2004 Yamaha YZ125
Vertex
$208.95Vertex - 09103380 - Top End Piston Kit - 53.94 mm - Yamaha YZ125FeaturesThe piston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston...$208.95 -
Vertex - VTK22652B - Top End Piston Kit - 53.96 mm - Suzuki RM125 - Fits 2000-2003 Suzuki RM125
Vertex
$223.95Vertex - 09103375 - Top End Piston Kit - 53.96 mm - Suzuki RM125FeaturesThe piston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston...$223.95 -
Vertex - 23375A - Piston Kit - 71.94 mm - Husqvarna | KTM - Fits 2014-2018 Husqvarna TE 300, 2004-2018 KTM 300 EXC/XC-W, 2006-2019 KTM 300 XC/XC-W
Vertex
$254.95Vertex - 09102421 - Piston Kit - 71.94 mm - Husqvarna | KTMFeaturesPiston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston lifeGravity-cast...$254.95 -
Vertex - 23375C - Piston Kit - 71.96 mm - Husqvarna | KTM
Vertex
$254.95Vertex - 09102422 - Piston Kit - 71.96 mm - Husqvarna | KTMFeaturesPiston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston lifeGravity-cast...$254.95 -
Vertex - VTK22499B-1 - Top End Piston Kit - 46.95 mm - Honda CR80R - Fits 1992-2002 Honda CR80R
Vertex
$164.95Vertex - 09103360 - Top End Piston Kit - 46.95 mm - Honda CR80RFeaturesThe piston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston...$164.95 -
Vertex - VTK22520B - Top End Piston Kit - 53.94 mm - Yamaha YZ125 - Fits 1998-2000 Yamaha YZ125
Vertex
$208.95Vertex - 09103379 - Top End Piston Kit - 53.94 mm - Yamaha YZ125FeaturesThe piston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston...$208.95 -
Vertex - VTK22189B-1 - Top End Piston Kit - 53.94 mm - Honda CR125R - Fits 1998-1999 Honda CR125R
Vertex
$202.95Vertex - 09103358 - Top End Piston Kit - 53.94 mm - Honda CR125RFeaturesThe piston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston...$202.95 -
Vertex - 23757B - Piston Kit - 77.97 mm - Husaberg | Husqvarna | KTM
Vertex
$289.95Vertex - 09103179 - Piston Kit - 77.97 mm - Husaberg | Husqvarna | KTMFeaturesThe piston skirt is treated with a Molybdenum Disulphite coating for a faster break-in time and increased piston...$289.95 -
Vertex - 23867A - Piston Kit - 80.96 mm - Husaberg | Husqvarna | KTM - Fits 2014-2016 Husqvarna FE 250, 2014-2015 Husqvarna FC 250, 2013-2015 KTM 250 SX-F, 2013-2015 KTM 250 XC-F, 2014-2015 KTM 250 XCF-W
Vertex
$327.95Vertex - 09103334 - Piston Kit - 80.96 mm - Husaberg | Husqvarna | KTMFeaturesThe piston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break in time and increased piston...$327.95 -
Vertex - 23870B - Piston Kit - 77.97 mm - Husaberg | Husqvarna | KTM
Vertex
$353.95Vertex - 09103338 - Piston Kit - 77.97 mm - Husaberg | Husqvarna | KTMFeaturesT-bridge design high compression piston with unique shot peened domeThe piston is heat-treated with a T-5 hardening and...$353.95 -
Vertex - 711195 - Wrist Pin
Vertex
$53.95Vertex - 09120470 - 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...$53.95 -
Vertex - 501368 - Oil Seal - 30 mm x 44 mm x 7 mm - Polaris/Yamaha
Vertex
$6.62Vertex - 09350547 - Oil Seal - 30 mm x 44 mm x 7 mm - Polaris/YamahaFeaturesReplacement Part for OEM Number(s):3083331Specs$6.62 -
Vertex - WR101-094 - Engine Rebuild Kit - Yamaha YZ125 - Fits 2002-2004 Yamaha YZ125
Vertex
$763.95Vertex - 09031069 - Engine Rebuild Kit - Yamaha YZ125FeaturesVertex piston kit (standard compression piston, rings, pin and clips)Hot Rods heavy-duty crank (stock stroke with wrist pin bearing)Hot...$763.95 -
Vertex - WR101-092 - Engine Rebuild Kit - KTM XC/XC-W 300 | Husqvarna TE300 - Fits 2014 Husqvarna TE 300, 2008-2014 KTM 300 XC, 2008-2014 KTM 300 XC-W
Vertex
$1,035.25Vertex - 09031067 - Engine Rebuild Kit - KTM XC/XC-W 300 | Husqvarna TE300FeaturesVertex piston kit (standard compression piston, rings, pin and clips)Hot Rods heavy-duty crank (stock stroke with...$1,035.25 -
Vertex - WR101-067 - Engine Rebuild Kit - KTM SX250 | Husqvarna TC250 - Fits 2014-2015 Husqvarna TC 250, 2007-2014 KTM 250 SX
Vertex
$1,035.25Vertex - 09031063 - Engine Rebuild Kit - KTM SX250 | Husqvarna TC250FeaturesVertex piston kit (standard compression piston, rings, pin and clips)Hot Rods heavy-duty crank (stock stroke with wrist pin...$1,035.25 -
Vertex - WR101-154 - Engine Rebuild Kit - KTM XC-W200 - Fits 2013-2014 KTM 200 XC-W
Vertex
$985.95Vertex - 09031123 - Engine Rebuild Kit - KTM XC-W200FeaturesVertex piston kit (standard compression piston, rings, pin and clips)Hot Rods heavy-duty crank (stock stroke with wrist pin bearing)Hot...$985.95 -
Vertex - WR101-153 - Engine Rebuild Kit - Honda CRF250R - Fits 2014-2015 Honda CRF250R
Vertex
$1,052.95Vertex - 09031122 - Engine Rebuild Kit - Honda CRF250RFeaturesIncludes crankshaft, piston kit, complete engine gasket kit with oil seals, main bearings and seals, water pump rebuild kit, transmission...$1,052.95 -
Vertex - WR101-150 - Engine Rebuild Kit - Honda CRF450R - Fits 2013-2016 Honda CRF450R
Vertex
$1,132.95Vertex - 09031119 - Engine Rebuild Kit - Honda CRF450RFeaturesIncludes crankshaft, piston kit, complete engine gasket kit with oil seals, main bearings and seals, water pump rebuild kit, transmission...$1,132.95 -
Vertex - WR101-148 - Engine Rebuild Kit - KTM SX85 | Husqvarna TC85 - Fits 2013-2014 KTM 85 SX, 2014-2017 Husqvarna TC 85
Vertex
$867.95Vertex - 09031117 - Engine Rebuild Kit - KTM SX85 | Husqvarna TC85FeaturesVertex piston kit (standard compression piston, rings, pin and clips)Hot Rods heavy-duty crank (stock stroke with wrist pin...$867.95 -
Vertex - WR101-152 - Engine Rebuild Kit - Honda CRF450R - Fits 2002-2003 Honda CRF450R
Vertex
$985.95Vertex - 09031121 - Engine Rebuild Kit - Honda CRF450RFeaturesIncludes crankshaft, piston kit, complete engine gasket kit with oil seals, main bearings and seals, water pump rebuild kit, transmission...$985.95 -
Vertex - WR101-146 - Engine Rebuild Kit - Yamaha WR250F - Fits 2005-2009 Yamaha WR250F
Vertex
$1,183.95Vertex - 09031116 - Engine Rebuild Kit - Yamaha WR250FFeaturesIncludes crankshaft, piston kit, complete engine gasket kit with oil seals, main bearings and seals, water pump rebuild kit, transmission...$1,183.95 -
Vertex - WR101-133 - Engine Rebuild Kit - Kawasaki KX85 - Fits 2006 Kawasaki KX85
Vertex
$618.95Vertex - 09031107 - Engine Rebuild Kit - Kawasaki KX85FeaturesVertex piston kit (standard compression piston, rings, pin and clips)Hot Rods heavy-duty crank (stock stroke with wrist pin bearing)Hot...$618.95 -
Vertex - WR101-134 - Engine Rebuild Kit - Kawasaki KX100 - Fits 2006-2013 Kawasaki KX100
Vertex
$711.95Vertex - 09031108 - Engine Rebuild Kit - Kawasaki KX100FeaturesVertex piston kit (standard compression piston, rings, pin and clips)Hot Rods heavy-duty crank (stock stroke with wrist pin bearing)Hot...$711.95 -
Vertex - WR101-132 - Engine Rebuild Kit - Honda CR125R - Fits 1996-1997 Honda CR125R
Vertex
$711.95Vertex - 09031106 - Engine Rebuild Kit - Honda CR125RFeaturesVertex piston kit (standard compression piston, rings, pin and clips)Hot Rods heavy-duty crank (stock stroke with wrist pin bearing)Hot...$711.95 -
Vertex - WR101-131 - Engine Rebuild Kit - Honda CR125R - Fits 1992-1995 Honda CR125R
Vertex
$711.95Vertex - 09031105 - Engine Rebuild Kit - Honda CR125RFeaturesVertex piston kit (standard compression piston, rings, pin and clips)Hot Rods heavy-duty crank (stock stroke with wrist pin bearing)Hot...$711.95 -
Vertex - WR101-127 - Engine Rebuild Kit - Yamaha YZ250 - Fits 2001 Yamaha YZ250
Vertex
$895.95Vertex - 09031101 - Engine Rebuild Kit - Yamaha YZ250FeaturesVertex piston kit (standard compression piston, rings, pin and clips)Hot Rods heavy-duty crank (stock stroke with wrist pin bearing)Hot...$895.95 -
Vertex - WR101-130 - Engine Rebuild Kit - Honda CR125R - Fits 1990-1991 Honda CR125R
Vertex
$711.95Vertex - 09031104 - Engine Rebuild Kit - Honda CR125RFeaturesVertex piston kit (standard compression piston, rings, pin and clips)Hot Rods heavy-duty crank (stock stroke with wrist pin bearing)Hot...$711.95 -
Vertex - WR101-126 - Engine Rebuild Kit - Yamaha YZ250 - Fits 1999-2000 Yamaha YZ250
Vertex
$867.95Vertex - 09031100 - Engine Rebuild Kit - Yamaha YZ250FeaturesVertex piston kit (standard compression piston, rings, pin and clips)Hot Rods heavy-duty crank (stock stroke with wrist pin bearing)Hot...$867.95 -
Vertex - WR101-125 - Engine Rebuild Kit - Yamaha YZ125 - Fits 2001 Yamaha YZ125
Vertex
$737.95Vertex - 09031099 - Engine Rebuild Kit - Yamaha YZ125FeaturesVertex piston kit (standard compression piston, rings, pin and clips)Hot Rods heavy-duty crank (stock stroke with wrist pin bearing)Hot...$737.95 -
Vertex - WR101-119 - Engine Rebuild Kit - KTM SX/XC150/SX144 - Fits KTM 2007-2008 144 SX, 2009-2013 150 SX, 2010-2014 150 XC
Vertex
$985.95Vertex - 09031093 - Engine Rebuild Kit - KTM SX/XC150/SX144FeaturesVertex piston kit (standard compression piston, rings, pin and clips)Hot Rods heavy-duty crank (stock stroke with wrist pin...$985.95 -
Vertex - WR101-114 - Engine Rebuild Kit - Kawasaki KX250 - Fits 2002-2003 Kawasaki KX250
Vertex
$867.95Vertex - 09031088 - Engine Rebuild Kit - Kawasaki KX250FeaturesVertex piston kit (standard compression piston, rings, pin and clips)Hot Rods heavy-duty crank (stock stroke with wrist pin bearing)Hot...$867.95 -
Vertex - WR101-113 - Engine Rebuild Kit - Kawasaki KX250 - Fits 1998-2001 Kawasaki KX250
Vertex
$911.35Vertex - 09031087 - Engine Rebuild Kit - Kawasaki KX250FeaturesVertex piston kit (standard compression piston, rings, pin and clips)Hot Rods heavy-duty crank (stock stroke with wrist pin bearing)Hot...$911.35 -
Vertex - WR101-111 - Engine Rebuild Kit - Kawasaki KX250 - Fits 1992 Kawasaki KX250
Vertex
$867.95Vertex - 09031085 - Engine Rebuild Kit - Kawasaki KX250FeaturesVertex piston kit (standard compression piston, rings, pin and clips)Hot Rods heavy-duty crank (stock stroke with wrist pin bearing)Hot...$867.95 -
Vertex - WR101-109 - Engine Rebuild Kit - Kawasaki KX85 - Fits 2001-2004 Kawasaki KX85
Vertex
$649.90Vertex - 09031083 - Engine Rebuild Kit - Kawasaki KX85FeaturesVertex piston kit (standard compression piston, rings, pin and clips)Hot Rods heavy-duty crank (stock stroke with wrist pin bearing)Hot...$649.90 -
Vertex - WR101-110 - Engine Rebuild Kit - Kawasaki KX85 - Fits 2005 Kawasaki KX85
Vertex
$592.95Vertex - 09031084 - Engine Rebuild Kit - Kawasaki KX85FeaturesVertex piston kit (standard compression piston, rings, pin and clips)Hot Rods heavy-duty crank (stock stroke with wrist pin bearing)Hot...$592.95 -
Vertex - WR101-107 - Engine Rebuild Kit - Kawasaki KX100 - Fits 2005 Kawasaki KX100
Vertex
$711.95Vertex - 09031081 - Engine Rebuild Kit - Kawasaki KX100FeaturesVertex piston kit (standard compression piston, rings, pin and clips)Hot Rods heavy-duty crank (stock stroke with wrist pin bearing)Hot...$711.95 -
Vertex - WR101-106 - Engine Rebuild Kit - Kawasaki KX100 | Suzuki RM100 - Fits 2001-2004 Kawasaki KX100
Vertex
$711.95Vertex - 09031080 - Engine Rebuild Kit - Kawasaki KX100 | Suzuki RM100FeaturesVertex piston kit (standard compression piston, rings, pin and clips)Hot Rods heavy-duty crank (stock stroke with wrist...$711.95 -
Vertex - WR101-104 - Engine Rebuild Kit - Honda CR85R/RB - Fits 2003-2004 Honda CR85R/RB
Vertex
$526.95Vertex - 09031078 - Engine Rebuild Kit - Honda CR85R/RBFeaturesVertex piston kit (standard compression piston, rings, pin and clips)Hot Rods heavy-duty crank (stock stroke with wrist pin bearing)Hot...$526.95 -
Vertex - WR101-099 - Engine Rebuild Kit - Honda CR125R - Fits 2004 Honda CR125R
Vertex
$683.95Vertex - 09031074 - Engine Rebuild Kit - Honda CR125RFeaturesVertex piston kit (standard compression piston, rings, pin and clips)Hot Rods heavy-duty crank (stock stroke with wrist pin bearing)Hot...$683.95 -
Vertex - WR101-091 - Engine Rebuild Kit - KTM XC/XC-W 250 | Husqvarna TE250 - Fits 2014 Husqvarna TE 250, 2008-2014 KTM 250 XC, 2008-2014 KTM 250 XC-W
Vertex
$1,064.65Vertex - 09031066 - Engine Rebuild Kit - KTM XC/XC-W 250 | Husqvarna TE250FeaturesVertex piston kit (standard compression piston, rings, pin and clips)Hot Rods heavy-duty crank (stock stroke with...$1,064.65
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.