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 - WR250R/X - 83mm P400485100032
ATHENA
$1,352.95ATHENA Cylinder Kit WR250R/X 83mm P400485100032Kits 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...09310252- SKU:
- 09310252
- Availability:
- Ships Same Business Day
- Weight:
- 4.29 LBS
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE SIZE METRIC:
- 83.00 MM
- CYLINDER BORE COATING:
- NICKEL-CARBIDE
- DISPLACEMENT:
- 290 CC
- ENGINE TYPE:
- 4-STROKE
- MATERIAL:
- ALUMINUM
$1,352.95 -
ATHENA Cylinder Kit - RM-Z450 - 100mm P400510100016
ATHENA
$1,004.95ATHENA Cylinder Kit RM-Z450 100mm P400510100016Kits 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...09310251- SKU:
- 09310251
- Availability:
- Ships Same Business Day
- Weight:
- 3.82 LBS
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- OFF-ROAD
- CYLINDER BORE COATING:
- NICKEL-CARBIDE
- BORE SIZE METRIC:
- 100.00 MM
- DISPLACEMENT:
- 490 CC
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- UNITS:
- KIT
$1,004.95Qty in Cart: 0Quantity:Price:$1,004.95Subtotal: -
ATHENA Cylinder Kit - SX65 - 50mm P400270100002
ATHENA
$872.95ATHENA Cylinder Kit SX65 50mm P400270100002Kits 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,...09310245- SKU:
- 09310245
- Availability:
- Ships Same Business Day
- Weight:
- 3.28 LBS
- DISPLACEMENT:
- 80 CC
- MATERIAL:
- ALUMINUM
- BORE SIZE METRIC:
- 50.00 MM
- CYLINDER BORE COATING:
- NICKEL-CARBIDE
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- BIG BORE
- UNITS:
- KIT
$872.95 -
Cylinder Works Big Bore Kit Yamaha YZ450F 2006-2009 WR450F 2007-2015 21003-K01
CYLINDER WORKS
$808.95CYLINDER WORKS Cylinder Big Bore Kit 21003-K01 Enhance your engine's performance with the CYLINDER WORKS Big Bore Kit, designed for easy installation and superior durability. This ready-to-install kit features OEM-like aesthetics and is engineered for...09310174- SKU:
- 09310174
- Availability:
- Ships Same Business Day
- Weight:
- 4.04 LBS
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- DISPLACEMENT:
- 478 CC
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 98,00 MM
- CYLINDER DIAMETER METRIC:
- 98.00 MM
- OVERBORE METRIC:
- +3.00 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$808.95 -
Cylinder Works Big Bore Cylinder Kit for Honda CRF250R 2004-2009 2012-2013 CRF250X 2004-2017 11001-K01
CYLINDER WORKS
$696.95CYLINDER WORKS Cylinder Big Bore Kit 11001-K01 Enhance your engine's performance with the Cylinder Works Big Bore Kit 11001-K01. Designed for easy installation, this kit provides a seamless upgrade without the need for re-plating. Experience improved...09310118- SKU:
- 09310118
- Availability:
- Ships Same Business Day
- Weight:
- 3.03 LBS
- CYLINDER DIAMETER METRIC:
- 81.00 MM
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 4-CYCLE
- COMPRESSION RATIO IMPERIAL:
- 13.0:1
- CYLINDER DIAMETER:
- 81,00 MM
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- DISPLACEMENT:
- 269 CC
- OVERBORE METRIC:
- +3.00 MM
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- UNITS:
- KIT
$696.95 -
ATHENA Cylinder Kit - RMZ450 - 100mm P400510100006
ATHENA
$1,156.95ATHENA Cylinder Kit RMZ450 100mm P400510100006Kits 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,...09310114- SKU:
- 09310114
- Availability:
- Ships Same Business Day
- Weight:
- 3.73 LBS
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- DISPLACEMENT:
- 490 CC
- ENGINE TYPE:
- 4-STROKE
- MATERIAL:
- ALUMINUM
- CYLINDER BORE COATING:
- NICKEL-CARBIDE
- UNITS:
- KIT
- BORE SIZE METRIC:
- 100.00 MM
- RIDING STYLE:
- OFF-ROAD
$1,156.95 -
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 -
BBR MOTORSPORTS Bore Kit Replacement Cylinder 411-HXR-5250
BBR MOTORSPORTS
$163.95BBR MOTORSPORTS Bore Kit Replacement Cylinder 411-HXR-5250Replacement Cylinder for 88CC Super Pro09310079- SKU:
- 09310079
- Availability:
- Ships Same Business Day
- Weight:
- 1.95 LBS
- BORE SIZE METRIC:
- 52.00 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- CYLINDER KIT
- TYPE:
- REPLACEMENT
$163.95 -
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 -
On Sale
BLOWSION Girdle Kit 01-03-109
BLOWSION
MSRP: $122.95Now: $79.00Was: $122.95BLOWSION Girdle Kit 01-03-109Girdle kit available for those looking for maximum cylinder support, Developed and designed in conjunction with the Kommander himself, Steve Webster, as a Blowsion exclusive offering, Domes, two required, are sold separately09300106- SKU:
- 09300106
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- TYPE:
- CYLINDER
- UNITS:
- KIT
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- GIRDLE KIT
- RIDING STYLE:
- WATERCRAFT
MSRP: $122.95Now: $79.00Was: $122.95Qty in Cart: 0Quantity:Price:MSRP: $122.95Now: $79.00Was: $122.95Subtotal: -
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
