Dirt Bike Engine
Explore our selection for dirt bike parts for adding horsepower or reliability to a dirt bike's engine. We feature engine parts from Wiseco, Vertex, and more common engine part manufacturers. Get new pistons and gasket kits for re-freshening engines to withstand any conditions you put your bike through!
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Dirt Bike Cams and Parts
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Dirt Bike Connecting Rods and Parts
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Dirt Bike Crankcases and Parts
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Dirt Bike Crankshafts and Parts
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Dirt Bike Cylinder Heads and Parts
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Dirt Bike Cylinders and Parts
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Dirt Bike Engine Bearings
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Dirt Bike Engine Covers
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Dirt Bike Engine Gaskets and Kits
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Dirt Bike Engine Rebuild Kits
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Dirt Bike Engine Seals - Orings and Kits
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Dirt Bike Engine Valves and Parts
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Dirt Bike Flywheel and Rod Assemblies
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Dirt Bike Fuel Filters
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Dirt Bike Miscellaneous Engine Parts
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Dirt Bike Oil Coolers
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Dirt Bike Oil Filters
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Dirt Bike Oil Lines
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Dirt Bike Oil Pumps
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Dirt Bike Piston and Ring Kits
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Dirt Bike Piston Rings Only
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Dirt Bike Wrist Pins and Circlips
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
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On Sale
CYLINDER WORKS Cylinder - Standard 40001
CYLINDER WORKS
MSRP: $360.95Now: $331.16Was: $367.95CYLINDER WORKS Cylinder Standard 40001Ready-to-install, direct bolt-on cylinder requires no re-plating and looks virtually identical to the OEM cylinders, Nickel silicon carbide-plated for long life, Made in the U.S.A.9310139- SKU:
- 9310139
- Availability:
- Ships Same Business Day
- Weight:
- 3.61 LBS
- CYLINDER DIAMETER METRIC:
- 90.00 MM
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- CYLINDER DIAMETER:
- 90,00 MM
- PRODUCT NAME:
- CYLINDER
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- STANDARD
- ENGINE TYPE:
- 4-CYCLE
- RIDING STYLE:
- STREET
MSRP: $360.95Now: $331.16Was: $367.95 -
On Sale
CYLINDER WORKS Cylinder Kit - Standard 20004-K01
CYLINDER WORKS
MSRP: $690.95Now: $634.46Was: $704.95CYLINDER WORKS Cylinder Kit Standard 20004-K01Ready-to-install, direct bolt-on cylinders require no re-plating and look virtually identical to the OEM cylinders, Cylinder kits include matched Vertex pistons to ensure longevity, performance and reduced...9310379- SKU:
- 9310379
- Availability:
- Ships Same Business Day
- Weight:
- 8.34 LBS
- PRODUCT NAME:
- CYLINDER KIT
- COMPRESSION RATIO IMPERIAL:
- 9.2:1
- CYLINDER DIAMETER:
- 102,00 MM
- CYLINDER DIAMETER METRIC:
- 102.00 MM
- UNITS:
- KIT
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- DISPLACEMENT:
- 686 CC
- STYLE:
- STANDARD
- ENGINE TYPE:
- 4-CYCLE
- RIDING STYLE:
- ATV
MSRP: $690.95Now: $634.46Was: $704.95 -
On Sale
CYLINDER WORKS Cylinder Kit - Big Bore 11004-K02
CYLINDER WORKS
MSRP: $570.95Now: $523.76Was: $581.95CYLINDER WORKS Cylinder Kit Big Bore 11004-K02Ready-to-install, direct bolt-on cylinders require no re-plating and look virtually identical to the OEM cylinders, Cylinder kits include matched Vertex pistons to ensure longevity, performance and reduced...9310485- SKU:
- 9310485
- Availability:
- Ships Same Business Day
- Weight:
- 2.80 LBS
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 68,00 MM
- DISPLACEMENT:
- 159 CC
- OVERBORE METRIC:
- +2.00 MM
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 11.7:1
- STYLE:
- BIG BORE
- CYLINDER DIAMETER METRIC:
- 68.00 MM
- ENGINE TYPE:
- 4-CYCLE
MSRP: $570.95Now: $523.76Was: $581.95 -
On Sale
CYLINDER WORKS Cylinder Kit - Big Bore 31011-K01
CYLINDER WORKS
MSRP: $689.95Now: $620.96Was: $689.95CYLINDER WORKS Cylinder Kit Big Bore 31011-K01Ready-to-install, direct bolt-on cylinders require no re-plating and look virtually identical to the OEM cylinders, Cylinder kits include matched Vertex pistons to ensure longevity, performance and reduced...9310603- SKU:
- 9310603
- Availability:
- Ships Same Business Day
- Weight:
- 3.95 LBS
- DISPLACEMENT:
- 469 CC
- OVERBORE METRIC:
- +2.00 MM
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- RIDING STYLE:
- OFF-ROAD
- CYLINDER DIAMETER:
- 98,00 MM
- CYLINDER DIAMETER METRIC:
- 98.00 MM
- ENGINE TYPE:
- 4-CYCLE
MSRP: $689.95Now: $620.96Was: $689.95 -
On Sale
CYLINDER WORKS Cylinder Kit - Standard Bore 60001-K02
CYLINDER WORKS
MSRP: $1,009.95Now: $926.96Was: $1,029.95CYLINDER WORKS Cylinder Kit Standard Bore 60001-K02Ready-to-install, direct bolt-on cylinders require no re-plating and look virtually identical to the OEM cylinders, Cylinder kits include matched Vertex pistons to ensure longevity, performance and...9310657- SKU:
- 9310657
- Availability:
- Ships Same Business Day
- Weight:
- 10.00 LBS
- COMPRESSION RATIO IMPERIAL:
- 10.6:1
- CYLINDER DIAMETER:
- 93,00 MM
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- DISPLACEMENT:
- 875 CC
- UNITS:
- KIT
- CYLINDER DIAMETER METRIC:
- 93.00 MM
- RIDING STYLE:
- UTV
- STYLE:
- STANDARD
MSRP: $1,009.95Now: $926.96Was: $1,029.95 -
DEL WEST Exhaust Valve DW-YZ250F-EV14
DEL WEST
$172.95DEL WEST Exhaust Valve DW-YZ250F-EV14Meets the demands of off-road, all valves are backed by an established record of performance and reliability in competition that is unapproachable9262721- SKU:
- 9262721
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- MATERIAL:
- TITANIUM
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- VALVE
$172.95 -
DEL WEST Intake Valves CRF250RIV10NDHF
DEL WEST
$172.95DEL WEST Intake Valves CRF250RIV10NDHFThe ultimate in high-performance valves for the serious engine builder, No compromise design, High-flow design includes a 50 degree seat angle, no dish valve face and 5mm stem diameter (intake and exhaust) for better...9262469- SKU:
- 9262469
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MATERIAL:
- TITANIUM
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$172.95 -
DEL WEST Exhaust Valves CRF250REV10NDHF
DEL WEST
$172.95DEL WEST Exhaust Valves CRF250REV10NDHFThe ultimate in high-performance valves for the serious engine builder, No compromise design, High-flow design includes a 50 degree seat angle, no dish valve face and 5mm stem diameter (intake and exhaust) for...9262470- SKU:
- 9262470
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MATERIAL:
- TITANIUM
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$172.95 -
DEL WEST Exhaust Valve DWCRF450REV09ND
DEL WEST
$172.95DEL WEST Exhaust Valve DWCRF450REV09NDMeets the demands of off-road, all valves are backed by an established record of performance and reliability in competition that is unapproachable9262471- SKU:
- 9262471
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MATERIAL:
- TITANIUM
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- APPLICATION:
- EXHAUST
$172.95 -
DEL WEST Valve Spring Retainer DW-H-RX01-S
DEL WEST
$54.95DEL WEST Valve Spring Retainer DW-H-RX01-SDel West is the world's largest supplier of titanium valves and valvetrain components for motor racing including those from NASCAR to the exotic engines of Formula One and a long relationship with Pro Circuit in...9262472- SKU:
- 9262472
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- APPLICATION:
- INTAKE
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- RETAINER
- TYPE:
- VALVE SPRING
- UNITS:
- EACH
- APPLICATION:
- EXHAUST
$54.95 -
DEL WEST Valve Spring Retainer DW-H-RX02-S
DEL WEST
$54.95DEL WEST Valve Spring Retainer DW-H-RX02-SDel West is the world's largest supplier of titanium valves and valvetrain components for motor racing including those from NASCAR to the exotic engines of Formula One and a long relationship with Pro Circuit in...9262473- SKU:
- 9262473
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- APPLICATION:
- INTAKE
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- VALVE SPRING
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- RETAINER
- UNITS:
- EACH
$54.95 -
DEL WEST Valve Spring Retainer DW-SZ-RX01-S
DEL WEST
$54.95DEL WEST Valve Spring Retainer DW-SZ-RX01-SDel West is the world's largest supplier of titanium valves and valvetrain components for motor racing including those from NASCAR to the exotic engines of Formula One and a long relationship with Pro Circuit in...9262474- SKU:
- 9262474
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- VALVE SPRING
- UNITS:
- EACH
- APPLICATION:
- INTAKE
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- RETAINER
$54.95 -
DEL WEST Valve Spring Retainer DW-H-RX03-S
DEL WEST
$54.95DEL WEST Valve Spring Retainer DW-H-RX03-SDel West is the world's largest supplier of titanium valves and valvetrain components for motor racing including those from NASCAR to the exotic engines of Formula One and a long relationship with Pro Circuit in...9262475- SKU:
- 9262475
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- EXHAUST
- TYPE:
- VALVE SPRING
- UNITS:
- EACH
- MATERIAL:
- STEEL
- PRODUCT NAME:
- RETAINER
- APPLICATION:
- INTAKE
$54.95Qty in Cart: 0Quantity:Price:$54.95Subtotal: -
DEL WEST Valve Spring Retainer DW-H-RX04-S
DEL WEST
$54.95DEL WEST Valve Spring Retainer DW-H-RX04-SDel West is the world's largest supplier of titanium valves and valvetrain components for motor racing including those from NASCAR to the exotic engines of Formula One and a long relationship with Pro Circuit in...9262476- SKU:
- 9262476
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- APPLICATION:
- EXHAUST
- TYPE:
- VALVE SPRING
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- STEEL
- PRODUCT NAME:
- RETAINER
$54.95 -
DEL WEST Exhaust Valve DW-CRF250R-EV08
DEL WEST
$172.95DEL WEST Exhaust Valve DW-CRF250R-EV08Meets the demands of off-road, all valves are backed by an established record of performance and reliability in competition that is unapproachable9261042- SKU:
- 9261042
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- MATERIAL:
- TITANIUM
- UNITS:
- EACH
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- OFF-ROAD
$172.95 -
DEL WEST Exhaust Valve DW-CRF250R-EV10
DEL WEST
$172.95DEL WEST Exhaust Valve DW-CRF250R-EV10Meets the demands of off-road, all valves are backed by an established record of performance and reliability in competition that is unapproachable9261043- SKU:
- 9261043
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- APPLICATION:
- EXHAUST
- UNITS:
- EACH
- PRODUCT NAME:
- VALVE
- MATERIAL:
- TITANIUM
- RIDING STYLE:
- OFF-ROAD
$172.95 -
DEL WEST Intake Valve DW-CRF250R-IV04
DEL WEST
$172.95DEL WEST Intake Valve DW-CRF250R-IV04Meets the demands of off-road, all valves are backed by an established record of performance and reliability in competition that is unapproachable9261044- SKU:
- 9261044
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- UNITS:
- EACH
- APPLICATION:
- INTAKE
- MATERIAL:
- TITANIUM
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- OFF-ROAD
$172.95 -
DEL WEST Intake Valve DW-CRF250R-IV10
DEL WEST
$172.95DEL WEST Intake Valve DW-CRF250R-IV10Meets the demands of off-road, all valves are backed by an established record of performance and reliability in competition that is unapproachable9261045- SKU:
- 9261045
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- PRODUCT NAME:
- VALVE
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- INTAKE
- MATERIAL:
- TITANIUM
$172.95 -
DEL WEST Exhaust Valve DW-CRF450R-EV02
DEL WEST
$172.95DEL WEST Exhaust Valve DW-CRF450R-EV02Meets the demands of off-road, all valves are backed by an established record of performance and reliability in competition that is unapproachable9261046- SKU:
- 9261046
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- APPLICATION:
- EXHAUST
- UNITS:
- EACH
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- TITANIUM
$172.95 -
DEL WEST Intake Valve DW-CRF450R-IV02
DEL WEST
$172.95DEL WEST Intake Valve DW-CRF450R-IV02Meets the demands of off-road, all valves are backed by an established record of performance and reliability in competition that is unapproachable9261049- SKU:
- 9261049
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- TITANIUM
- UNITS:
- EACH
$172.95
