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
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- Quantity
- Price
- Subtotal
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On Sale
CYLINDER WORKS Cylinder Kit - Standard 40004-K01
CYLINDER WORKS
MSRP: $577.95Now: $530.96Was: $589.95CYLINDER WORKS Cylinder Kit Standard 40004-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...9310343- SKU:
- 9310343
- Availability:
- Ships Same Business Day
- Weight:
- 3.25 LBS
- COMPRESSION RATIO IMPERIAL:
- 13.4:1
- CYLINDER DIAMETER METRIC:
- 77.00 MM
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- STANDARD
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 4-CYCLE
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 77,00 MM
- PRODUCT NAME:
- CYLINDER KIT
- UNITS:
- KIT
MSRP: $577.95Now: $530.96Was: $589.95 -
On Sale
CYLINDER WORKS Cylinder Kit - Standard 30005-K01
CYLINDER WORKS
MSRP: $559.95Now: $512.06Was: $568.95CYLINDER WORKS Cylinder Kit Standard 30005-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...9310341- SKU:
- 9310341
- Availability:
- Ships Same Business Day
- Weight:
- 3.30 LBS
- COMPRESSION RATIO IMPERIAL:
- 13.2:1
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- CYLINDER DIAMETER:
- 77,00 MM
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER
- CYLINDER DIAMETER METRIC:
- 77.00 MM
- STYLE:
- STANDARD
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
MSRP: $559.95Now: $512.06Was: $568.95 -
On Sale
CYLINDER WORKS Cylinder Kit - Big Bore 11007-K01
CYLINDER WORKS
MSRP: $649.95Now: $584.96Was: $649.95CYLINDER WORKS Cylinder Kit Big Bore 11007-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...9310340- SKU:
- 9310340
- Availability:
- Ships Same Business Day
- Weight:
- 3.68 LBS
- COMPRESSION RATIO IMPERIAL:
- 13.2:1
- CYLINDER DIAMETER METRIC:
- 80.00 MM
- RIDING STYLE:
- OFF-ROAD
- DISPLACEMENT:
- 270 CC
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 80,00 MM
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- UNITS:
- KIT
- ENGINE TYPE:
- 4-CYCLE
- OVERBORE METRIC:
- +3.20 MM
MSRP: $649.95Now: $584.96Was: $649.95 -
On Sale
CYLINDER WORKS Cylinder Kit - Standard 10007-K01
CYLINDER WORKS
MSRP: $559.95Now: $503.96Was: $559.95CYLINDER WORKS Cylinder Kit Standard 10007-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...9310338- SKU:
- 9310338
- Availability:
- Ships Same Business Day
- Weight:
- 3.55 LBS
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 76,80 MM
- UNITS:
- KIT
- CYLINDER DIAMETER METRIC:
- 76.80 MM
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 13.2:1
MSRP: $559.95Now: $503.96Was: $559.95 -
On Sale
ATHENA Cylinder Kit - KXF450 P400250100015
ATHENA
MSRP: $939.95Now: $845.96Was: $939.95ATHENA Cylinder Kit KXF450 P400250100015Kits 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...9310328- SKU:
- 9310328
- Availability:
- Ships Same Business Day
- Weight:
- 4.98 LBS
- DISPLACEMENT:
- 490 CC
- MATERIAL:
- ALUMINUM
- ENGINE TYPE:
- 4-STROKE
- STYLE:
- BIG BORE
- BORE SIZE METRIC:
- 100.00 MM
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- CYLINDER BORE COATING:
- NICKEL-CARBIDE
MSRP: $939.95Now: $845.96Was: $939.95 -
On Sale
ATHENA Cylinder Kit - KX250F P400250100013
ATHENA
MSRP: $926.95Now: $834.26Was: $926.95ATHENA Cylinder Kit KX250F P400250100013Kits 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...9310308- SKU:
- 9310308
- Availability:
- Ships Same Business Day
- Weight:
- 3.02 LBS
- BORE SIZE METRIC:
- 83.00 MM
- DISPLACEMENT:
- 290 CC
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- OFF-ROAD
- CYLINDER BORE COATING:
- NICKEL-CARBIDE
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- UNITS:
- KIT
MSRP: $926.95Now: $834.26Was: $926.95 -
On Sale
CYLINDER WORKS Cylinder Kit - Standard 30004-K01
CYLINDER WORKS
MSRP: $559.95Now: $512.06Was: $568.95CYLINDER WORKS Cylinder Kit Standard 30004-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...9310277- SKU:
- 9310277
- Availability:
- Ships Same Business Day
- Weight:
- 3.15 LBS
- COMPRESSION RATIO IMPERIAL:
- 13.2:1
- CYLINDER DIAMETER METRIC:
- 77.00 MM
- RIDING STYLE:
- OFF-ROAD
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 4-CYCLE
- STYLE:
- STANDARD
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 77,00 MM
- PRODUCT NAME:
- CYLINDER KIT
- UNITS:
- KIT
MSRP: $559.95Now: $512.06Was: $568.95 -
On Sale
CYLINDER WORKS Cylinder Kit - Standard 10002-K01
CYLINDER WORKS
MSRP: $595.95Now: $536.36Was: $595.95CYLINDER WORKS Cylinder Kit Standard 10002-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...9310272- SKU:
- 9310272
- Availability:
- Ships Same Business Day
- Weight:
- 4.51 LBS
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 96,00 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 12.1:1
- DISPLACEMENT:
- 449 CC
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- CYLINDER DIAMETER METRIC:
- 96.00 MM
- STYLE:
- STANDARD
MSRP: $595.95Now: $536.36Was: $595.95 -
On Sale
CYLINDER WORKS Cylinder Kit - Standard 10001-K02
CYLINDER WORKS
MSRP: $559.95Now: $503.96Was: $559.95CYLINDER WORKS Cylinder Kit Standard 10001-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...9310271- SKU:
- 9310271
- Availability:
- Ships Same Business Day
- Weight:
- 3.55 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- STYLE:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 13.0:1
- CYLINDER DIAMETER:
- 78,00 MM
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER METRIC:
- 78.00 MM
MSRP: $559.95Now: $503.96Was: $559.95 -
On Sale
CYLINDER WORKS Cylinder Kit - Standard 10001-K01
CYLINDER WORKS
MSRP: $599.95Now: $539.96Was: $599.95CYLINDER WORKS Cylinder Kit Standard 10001-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...9310270- SKU:
- 9310270
- Availability:
- Ships Same Business Day
- Weight:
- 4.32 LBS
- COMPRESSION RATIO IMPERIAL:
- 12.9:1
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER METRIC:
- 78.00 MM
- CYLINDER DIAMETER:
- 78,00 MM
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- STANDARD
MSRP: $599.95Now: $539.96Was: $599.95 -
On Sale
CYLINDER WORKS Cylinder Kit - Standard 10004-K01
CYLINDER WORKS
MSRP: $539.95Now: $485.96Was: $539.95CYLINDER WORKS Cylinder Kit Standard 10004-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...9310269- SKU:
- 9310269
- Availability:
- Ships Same Business Day
- Weight:
- 2.80 LBS
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER METRIC:
- 66.00 MM
- STYLE:
- STANDARD
- CYLINDER DIAMETER:
- 66,00 MM
- DISPLACEMENT:
- 149 CC
- ENGINE TYPE:
- 4-CYCLE
- COMPRESSION RATIO IMPERIAL:
- 11.7:1
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
MSRP: $539.95Now: $485.96Was: $539.95 -
On Sale
ATHENA Cylinder Kit - YZ125 - 58mm P400485100029
ATHENA
MSRP: $1,025.95Now: $923.36Was: $1,025.95ATHENA Cylinder Kit YZ125 58mm P400485100029Kits 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,...9310258- SKU:
- 9310258
- Availability:
- Ships Same Business Day
- Weight:
- 5.43 LBS
- BORE SIZE METRIC:
- 58.00 MM
- MATERIAL:
- ALUMINUM
- CYLINDER BORE COATING:
- NICKEL-CARBIDE
- ENGINE TYPE:
- 2-STROKE
- DISPLACEMENT:
- 144 CC
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- BIG BORE
- UNITS:
- KIT
MSRP: $1,025.95Now: $923.36Was: $1,025.95 -
On Sale
ATHENA Cylinder Kit - WR250R/X - 83mm P400485100032
ATHENA
MSRP: $1,134.95Now: $1,021.46Was: $1,134.95ATHENA 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...9310252- SKU:
- 9310252
- 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
MSRP: $1,134.95Now: $1,021.46Was: $1,134.95 -
On Sale
ATHENA Cylinder Kit - RM-Z450 - 100mm P400510100016
ATHENA
MSRP: $1,004.95Now: $904.46Was: $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...9310251- SKU:
- 9310251
- 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
MSRP: $1,004.95Now: $904.46Was: $1,004.95 -
On Sale
ATHENA Cylinder Kit - SX65 - 50mm P400270100002
ATHENA
MSRP: $731.95Now: $658.76Was: $731.95ATHENA 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,...9310245- SKU:
- 9310245
- 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
MSRP: $731.95Now: $658.76Was: $731.95 -
On Sale
CYLINDER WORKS Cylinder Big Bore Kit 21003-K01
CYLINDER WORKS
MSRP: $716.95Now: $657.86Was: $730.95CYLINDER WORKS Cylinder Big Bore Kit 21003-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...9310174- SKU:
- 9310174
- 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
MSRP: $716.95Now: $657.86Was: $730.95 -
On Sale
CYLINDER WORKS Cylinder Big Bore Kit 11001-K01
CYLINDER WORKS
MSRP: $649.95Now: $584.96Was: $649.95CYLINDER WORKS Cylinder Big Bore Kit 11001-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...9310118- SKU:
- 9310118
- 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
MSRP: $649.95Now: $584.96Was: $649.95 -
On Sale
ATHENA Cylinder Kit - RMZ450 - 100mm P400510100006
ATHENA
MSRP: $969.95Now: $872.96Was: $969.95ATHENA 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,...9310114- SKU:
- 9310114
- 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
MSRP: $969.95Now: $872.96Was: $969.95 -
On Sale
ATHENA Cylinder Kit - KX125 - 58mm P400250100011
ATHENA
MSRP: $1,007.95Now: $907.16Was: $1,007.95ATHENA 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,...9310109- SKU:
- 9310109
- 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
MSRP: $1,007.95Now: $907.16Was: $1,007.95 -
On Sale
ATHENA Cylinder Kit - KX65 - 50mm P400250100007
ATHENA
MSRP: $781.95Now: $703.76Was: $781.95ATHENA 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,...9310107- SKU:
- 9310107
- 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
MSRP: $781.95Now: $703.76Was: $781.95Qty in Cart: 0Quantity:Price:MSRP: $781.95Now: $703.76Was: $781.95Subtotal:
