Dirt Bike Engine
Discover a full range of dirt bike engine components for rebuilding or upgrading your performance. From crankshafts to cylinder heads and piston kits, these precision-engineered components ensure reliable performance. For additional upgrades, check out our full selection of off-road dirt bike parts.
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ATHENA Cylinder Kit - KX125 - 58mm P400250100011
ATHENA
$1,201.95ATHENA Cylinder Kit KX125 58mm P400250100011Kits include aluminum cylinder with nickel-carbide coating designed with larger water jackets, Forged piston with molybdenum coating, Special gasket kit, Easy-to-follow step-by-step installation instructions,...09310109- SKU:
- 09310109
- Availability:
- Ships Same Business Day
- Weight:
- 5.62 LBS
- BORE SIZE METRIC:
- 58.00 MM
- MATERIAL:
- ALUMINUM
- CYLINDER BORE COATING:
- NICKEL-CARBIDE
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- DISPLACEMENT:
- 144 CC
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- UNITS:
- KIT
$1,201.95 -
ATHENA Cylinder Kit - KX65 - 50mm P400250100007
ATHENA
$932.95ATHENA Cylinder Kit KX65 50mm P400250100007Kits include aluminum cylinder with nickel-carbide coating designed with larger water jackets, Forged piston with molybdenum coating, Special gasket kit, Easy-to-follow step-by-step installation instructions,...09310107- SKU:
- 09310107
- Availability:
- Ships Same Business Day
- Weight:
- 3.31 LBS
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- DISPLACEMENT:
- 80 CC
- BORE SIZE METRIC:
- 50.00 MM
- CYLINDER BORE COATING:
- NICKEL-CARBIDE
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- MATERIAL:
- ALUMINUM
$932.95 -
ATHENA Cylinder Kit - YZ125 - 54mm P400485100017
ATHENA
$1,110.95ATHENA Cylinder Kit YZ125 54mm P400485100017Kits include aluminum cylinder with nickel-carbide coating designed with larger water jackets, Forged piston with molybdenum coating, Special gasket kit, Easy-to-follow step-by-step installation instructions,...09310095- SKU:
- 09310095
- Availability:
- Ships Same Business Day
- Weight:
- 5.60 LBS
- DISPLACEMENT:
- 125 CC
- PRODUCT NAME:
- CYLINDER KIT
- MATERIAL:
- ALUMINUM
- BORE SIZE METRIC:
- 54.00 MM
- CYLINDER BORE COATING:
- NICKEL-CARBIDE
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- STYLE:
- STOCK BORE
$1,110.95 -
ATHENA Cylinder Kit - Yamaha 070200
ATHENA
$262.95ATHENA Cylinder Kit Yamaha 070200Kits include aluminum cylinder with nickel-carbide coating designed with larger water jackets, Forged piston with molybdenum coating, Special gasket kit, Easy-to-follow step-by-step installation instructions, All are...09310077- SKU:
- 09310077
- Availability:
- Ships Same Business Day
- Weight:
- 2.70 LBS
- CYLINDER BORE COATING:
- NICKEL-CARBIDE
- ENGINE TYPE:
- 2-STROKE
- UNITS:
- KIT
- DISPLACEMENT:
- 70 CC
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- STREET
- STYLE:
- BIG BORE
- BORE SIZE METRIC:
- 47.66 MM
- MATERIAL:
- ALUMINUM
$262.95 -
ATHENA Cylinder Kit - Yamaha/Malaguti 070100
ATHENA
$262.95ATHENA Cylinder Kit Yamaha/Malaguti 070100Kits include aluminum cylinder with nickel-carbide coating designed with larger water jackets, Forged piston with molybdenum coating, Special gasket kit, Easy-to-follow step-by-step installation instructions, All...09310076- SKU:
- 09310076
- Availability:
- Ships Same Business Day
- Weight:
- 2.80 LBS
- CYLINDER BORE COATING:
- NICKEL-CARBIDE
- UNITS:
- KIT
- DISPLACEMENT:
- 70 CC
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- STREET
- STYLE:
- BIG BORE
- BORE SIZE METRIC:
- 47.66 MM
- ENGINE TYPE:
- 2-STROKE
- MATERIAL:
- ALUMINUM
$262.95 -
ATHENA Cylinder Kit - YZ250F - 83mm P400485100012
ATHENA
$1,142.95ATHENA Cylinder Kit YZ250F 83mm P400485100012Kits include aluminum cylinder with nickel-carbide coating designed with larger water jackets, Forged piston with molybdenum coating, Special gasket kit, Easy-to-follow step-by-step installation instructions,...09310024- SKU:
- 09310024
- Availability:
- Ships Same Business Day
- Weight:
- 3.68 LBS
- DISPLACEMENT:
- 290 CC
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- ALUMINUM
- BORE SIZE METRIC:
- 83.00 MM
- CYLINDER BORE COATING:
- NICKEL-CARBIDE
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- UNITS:
- KIT
$1,142.95 -
ATHENA Cylinder Kit - KLX/DRZ/KFX/LTZ400 P400510100002
ATHENA
$1,117.95ATHENA Cylinder Kit KLX/DRZ/KFX/LTZ400 P400510100002Kits include aluminum cylinder with nickel-carbide coating designed with larger water jackets, Forged piston with molybdenum coating, Special gasket kit, Easy-to-follow step-by-step installation...09310016- SKU:
- 09310016
- Availability:
- Ships Same Business Day
- Weight:
- 4.95 LBS
- DISPLACEMENT:
- 435 CC
- MATERIAL:
- ALUMINUM
- BORE SIZE METRIC:
- 94.00 MM
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- CYLINDER BORE COATING:
- NICKEL-CARBIDE
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- UNITS:
- KIT
$1,117.95 -
ATHENA Cylinder Kit - DRZ/KFX P400510100001
ATHENA
$772.95ATHENA Cylinder Kit DRZ/KFX P400510100001Kits include aluminum cylinder with nickel-carbide coating designed with larger water jackets, Forged piston with molybdenum coating, Special gasket kit, Easy-to-follow step-by-step installation instructions, All...09310015- SKU:
- 09310015
- Availability:
- Ships Same Business Day
- Weight:
- 4.71 LBS
- BORE SIZE METRIC:
- 90.00 MM
- MATERIAL:
- ALUMINUM
- STYLE:
- STOCK BORE
- CYLINDER BORE COATING:
- NICKEL-CARBIDE
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- CYLINDER KIT
- DISPLACEMENT:
- 400 CC
$772.95 -
ATHENA Cylinder Kit - KX125 - 54mm P400250100001
ATHENA
$970.95ATHENA Cylinder Kit KX125 54mm P400250100001Kits include aluminum cylinder with nickel-carbide coating designed with larger water jackets, Forged piston with molybdenum coating, Special gasket kit, Easy-to-follow step-by-step installation instructions,...09310012- SKU:
- 09310012
- Availability:
- Ships Same Business Day
- Weight:
- 6.18 LBS
- BORE SIZE METRIC:
- 54.00 MM
- CYLINDER BORE COATING:
- NICKEL-CARBIDE
- UNITS:
- KIT
- DISPLACEMENT:
- 125 CC
- PRODUCT NAME:
- CYLINDER KIT
- ENGINE TYPE:
- 2-STROKE
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- STOCK BORE
$970.95 -
BLOWSION Cylinder Head 01-03-118
BLOWSION
$305.95BLOWSION Cylinder Head 01-03-118Developed and designed in conjunction with the Kommander himself, Steve Webster, as a Blowsion exclusive offering, One-piece Yamaha billet aluminum/CNC performance cylinder head kit provides the best of both worlds with...09300105- SKU:
- 09300105
- Availability:
- Ships Same Business Day
- Weight:
- 4.50 LBS
- PRODUCT NAME:
- HEAD
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- CYLINDER
- COLOR/FINISH:
- BLACK
- MATERIAL:
- ALUMINUM
- UNITS:
- EACH
$305.95 -
Wiseco Valve Kit 2012-2016 KTM 350 EXC-F SVKB6353
WISECO
$344.95WISECO Valve Kit SVKB6353 Enhance your engine's performance with the WISECO Valve Kit SVKB6353, a comprehensive solution featuring high-quality valves and springs designed for both intake and exhaust applications. This kit ensures optimal reliability and...09263086- SKU:
- 09263086
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- UNITS:
- KIT
- APPLICATION:
- EXHAUST
- APPLICATION:
- INTAKE
- MATERIAL:
- STEEL
- PRODUCT NAME:
- VALVE KIT
- RIDING STYLE:
- OFF-ROAD
$344.95 -
Hot Cams Titanium Intake Valve for 2015 Yamaha WR250F 2014-2015 Yamaha YZ250F 8400036-2
HOT CAMS
$114.95HOT CAMS Intake Valve 8400036-2 Upgrade your engine's performance with the HOT CAMS Intake Valve 8400036-2, designed as a premium forged one-piece OEM replacement. Engineered for precision, this valve features enhanced durability and optimal fit for...09262637- SKU:
- 09262637
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- OFF-ROAD
- BASE COLOR:
- SILVER
- COLOR/FINISH:
- TITANIUM
- MATERIAL:
- NITRIDE COATED
- MATERIAL:
- TITANIUM
- UNITS:
- EACH
$114.95 -
Hot Cams Titanium Exhaust Valve Yamaha YZ250F 2014-2021 8400036-1
HOT CAMS
$102.95HOT CAMS Exhaust Valve 8400036-1 Enhance your engine's performance with the HOT CAMS Exhaust Valve 8400036-1, designed as a high-quality OEM replacement. This valve features precision machining for optimal fit and function, ensuring reliable operation...09262636- SKU:
- 09262636
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- APPLICATION:
- EXHAUST
- BASE COLOR:
- SILVER
- UNITS:
- EACH
- COLOR/FINISH:
- TITANIUM
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- TITANIUM
- PRODUCT NAME:
- VALVE
$102.95 -
Hot Cams Titanium Intake Valve for Honda CRF250R 2010-2017 8400032-2
HOT CAMS
$102.95HOT CAMS Intake Valve 8400032-2 Upgrade your engine's performance with the HOT CAMS Intake Valve 8400032-2, designed for precision and durability. This forged one-piece valve ensures a perfect fit and exceptional reliability, making it an ideal OEM...09262630- SKU:
- 09262630
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- BASE COLOR:
- SILVER
- APPLICATION:
- INTAKE
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- TITANIUM
- MATERIAL:
- NITRIDE COATED
- MATERIAL:
- TITANIUM
- UNITS:
- EACH
- PRODUCT NAME:
- VALVE
$102.95 -
Hot Cams Titanium Intake Valve for Kawasaki KX450F 2009-2015 8400031-2
HOT CAMS
$102.95HOT CAMS Intake Valve 8400031-2 Upgrade your engine's performance with the HOT CAMS Intake Valve 8400031-2. This high-quality, forged one-piece valve is designed for precision and durability, ensuring optimal airflow and longevity in your engine. With...09262629- SKU:
- 09262629
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- BASE COLOR:
- SILVER
- APPLICATION:
- INTAKE
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- TITANIUM
- MATERIAL:
- NITRIDE COATED
- MATERIAL:
- TITANIUM
- UNITS:
- EACH
- PRODUCT NAME:
- VALVE
$102.95 -
Hot Cams Titanium Exhaust Valve Kawasaki KX450F 2009-2015 8400031-1
HOT CAMS
$114.95HOT CAMS Exhaust Valve 8400031-1 Upgrade your engine's performance with the HOT CAMS Exhaust Valve 8400031-1, designed for seamless compatibility and exceptional durability. Crafted from high-quality forged materials, this valve delivers precision and...09262628- SKU:
- 09262628
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- BASE COLOR:
- SILVER
- MATERIAL:
- NITRIDE COATED
- UNITS:
- EACH
- COLOR/FINISH:
- TITANIUM
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- VALVE
- MATERIAL:
- TITANIUM
$114.95 -
Hot Cams Titanium Intake Valve 2009-2016 Kawasaki KX250F 8400030-2
HOT CAMS
$102.95HOT CAMS Intake Valve 8400030-2 Upgrade your engine's performance with the HOT CAMS Intake Valve 8400030-2. This high-quality, forged one-piece valve is designed for precision and durability, ensuring optimal engine efficiency. Its advanced coatings and...09262627- SKU:
- 09262627
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- BASE COLOR:
- SILVER
- MATERIAL:
- NITRIDE COATED
- UNITS:
- EACH
- COLOR/FINISH:
- TITANIUM
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- INTAKE
- MATERIAL:
- TITANIUM
- PRODUCT NAME:
- VALVE
$102.95 -
Hot Cams Titanium Intake Valve for Honda CRF450X 2005-2017 8400028-2
HOT CAMS
$80.95HOT CAMS Intake Valve 8400028-2 Upgrade your engine's performance with the HOT CAMS Intake Valve 8400028-2, designed for precision and durability. This forged one-piece valve ensures optimal fit and function, enhancing your vehicle's efficiency and power...09262624- SKU:
- 09262624
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MATERIAL:
- TITANIUM
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- VALVE
- BASE COLOR:
- SILVER
- COLOR/FINISH:
- TITANIUM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$80.95 -
Hot Cams Titanium Intake Valve for Honda CRF450R 2009-2016 8400027-2
HOT CAMS
$99.95HOT CAMS Intake Valve 8400027-2 Upgrade your engine's performance with the HOT CAMS Intake Valve 8400027-2, designed for precision and durability. This forged one-piece valve ensures a perfect fit and superior strength, making it an ideal OEM replacement...09262623- SKU:
- 09262623
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MATERIAL:
- TITANIUM
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- VALVE
- COLOR/FINISH:
- TITANIUM
- MATERIAL:
- NITRIDE COATED
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- BASE COLOR:
- SILVER
$99.95 -
Hot Cams Titanium Intake Valve 2004-2008 Kawasaki KX250F 8400011-2
HOT CAMS
$102.95HOT CAMS Intake Valve 8400011-2 Upgrade your engine's performance with the HOT CAMS Intake Valve 8400011-2, designed for precision and durability. This forged one-piece valve ensures a perfect fit and superior strength, making it an ideal OEM replacement...09262612- SKU:
- 09262612
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- MATERIAL:
- NITRIDE COATED
- PRODUCT NAME:
- VALVE
- UNITS:
- EACH
- COLOR/FINISH:
- TITANIUM
- MATERIAL:
- TITANIUM
- APPLICATION:
- INTAKE
- BASE COLOR:
- SILVER
- RIDING STYLE:
- OFF-ROAD
$102.95
