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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On Sale
CYLINDER WORKS Big Bore Gasket Kit 21007-G01
CYLINDER WORKS
MSRP: $89.95Now: $80.96Was: $89.95CYLINDER WORKS Big Bore Gasket Kit 21007-G01Ready-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...9342154- SKU:
- 9342154
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
MSRP: $89.95Now: $80.96Was: $89.95Qty in Cart: 0Quantity:Price:MSRP: $89.95Now: $80.96Was: $89.95Subtotal: -
On Sale
CYLINDER WORKS Big Bore Gasket Kit 51004-G01
CYLINDER WORKS
MSRP: $128.95Now: $118.76Was: $131.95CYLINDER WORKS Big Bore Gasket Kit 51004-G01Ready-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...9343130- SKU:
- 9343130
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- MATERIAL:
- NICKEL SILICON CARBIDE
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- STYLE:
- BIG BORE
- UNITS:
- KIT
MSRP: $128.95Now: $118.76Was: $131.95 -
On Sale
CYLINDER WORKS Big Bore Gasket Kit 21005-G02
CYLINDER WORKS
MSRP: $96.95Now: $87.26Was: $96.95CYLINDER WORKS Big Bore Gasket Kit 21005-G02Ready-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...9344051- SKU:
- 9344051
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
MSRP: $96.95Now: $87.26Was: $96.95Qty in Cart: 0Quantity:Price:MSRP: $96.95Now: $87.26Was: $96.95Subtotal: -
On Sale
CYLINDER WORKS Big Bore Gasket Kit 21010-G01
CYLINDER WORKS
MSRP: $92.95Now: $83.66Was: $92.95CYLINDER WORKS Big Bore Gasket Kit 21010-G01Ready-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...9344052- SKU:
- 9344052
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- GASKET KIT
- STYLE:
- BIG BORE
- MATERIAL:
- NICKEL SILICON CARBIDE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- TYPE:
- TOP END
MSRP: $92.95Now: $83.66Was: $92.95 -
On Sale
CYLINDER WORKS Big Bore Gasket Kit 31011-G01
CYLINDER WORKS
MSRP: $89.95Now: $80.96Was: $89.95CYLINDER WORKS Big Bore Gasket Kit 31011-G01Ready-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...9344056- SKU:
- 9344056
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- STYLE:
- BIG BORE
- MATERIAL:
- NICKEL SILICON CARBIDE
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- TOP END
MSRP: $89.95Now: $80.96Was: $89.95 -
On Sale
CYLINDER WORKS Cylinder Head Kit CH1001-K01
CYLINDER WORKS
MSRP: $429.95Now: $395.06Was: $438.95CYLINDER WORKS Cylinder Head Kit CH1001-K01New replacement cylinder head, Include cam caps and cam cap bolts, Include C630 (nickel/aluminum/bronze) valve seats and guides, Competition valve job, Shortened valve guides to accept higher lift cams,...9300127- SKU:
- 9300127
- Availability:
- Ships Same Business Day
- Weight:
- 6.20 LBS
- PRODUCT NAME:
- CYLINDER HEAD KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
MSRP: $429.95Now: $395.06Was: $438.95 -
On Sale
CYLINDER WORKS Cylinder Head Kit CH1002-K01
CYLINDER WORKS
MSRP: $429.95Now: $395.06Was: $438.95CYLINDER WORKS Cylinder Head Kit CH1002-K01New replacement cylinder head, Include cam caps and cam cap bolts, Include C630 (nickel/aluminum/bronze) valve seats and guides, Competition valve job, Shortened valve guides to accept higher lift cams,...9300128- SKU:
- 9300128
- Availability:
- Ships Same Business Day
- Weight:
- 6.15 LBS
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- CYLINDER HEAD KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
MSRP: $429.95Now: $395.06Was: $438.95 -
On Sale
CYLINDER WORKS Cylinder Head Kit CH1003-K01
CYLINDER WORKS
MSRP: $409.95Now: $376.16Was: $417.95CYLINDER WORKS Cylinder Head Kit CH1003-K01New replacement cylinder head, Include cam caps and cam cap bolts, Include C630 (nickel/aluminum/bronze) valve seats and guides, Competition valve job, Shortened valve guides to accept higher lift cams,...9300129- SKU:
- 9300129
- Availability:
- Ships Same Business Day
- Weight:
- 6.30 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- CYLINDER HEAD KIT
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 4-STROKE
MSRP: $409.95Now: $376.16Was: $417.95 -
On Sale
CYLINDER WORKS Cylinder Head Kit CH2001-K01
CYLINDER WORKS
MSRP: $215.95Now: $197.96Was: $219.95CYLINDER WORKS Cylinder Head Kit CH2001-K01New replacement cylinder head, Include cam caps and cam cap bolts, Include C630 (nickel/aluminum/bronze) valve seats and guides, Competition valve job, Shortened valve guides to accept higher lift cams,...9300130- SKU:
- 9300130
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- CYLINDER HEAD KIT
- RIDING STYLE:
- OFF-ROAD
MSRP: $215.95Now: $197.96Was: $219.95 -
On Sale
CYLINDER WORKS Cylinder Kit - High Compression 10007-K02HC
CYLINDER WORKS
MSRP: $579.95Now: $521.96Was: $579.95CYLINDER WORKS Cylinder Kit High Compression 10007-K02HCReady-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...9310584- SKU:
- 9310584
- Availability:
- Ships Same Business Day
- Weight:
- 3.45 LBS
- COMPRESSION RATIO IMPERIAL:
- 14.1:1
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- HIGH COMPRESSION
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- CYLINDER DIAMETER:
- 76,80 MM
- CYLINDER DIAMETER METRIC:
- 76.80 MM
MSRP: $579.95Now: $521.96Was: $579.95 -
On Sale
CYLINDER WORKS Cylinder Kit - Standard Bore 30006-K02
CYLINDER WORKS
MSRP: $559.95Now: $512.06Was: $568.95CYLINDER WORKS Cylinder Kit Standard Bore 30006-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...9310592- SKU:
- 9310592
- Availability:
- Ships Same Business Day
- Weight:
- 3.35 LBS
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 13.8:1
- CYLINDER DIAMETER:
- 77,00 MM
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- CYLINDER DIAMETER METRIC:
- 77.00 MM
- STYLE:
- STANDARD
MSRP: $559.95Now: $512.06Was: $568.95 -
On Sale
CYLINDER WORKS Cylinder Kit - Standard Bore 30011-K01
CYLINDER WORKS
MSRP: $569.95Now: $512.96Was: $569.95CYLINDER WORKS Cylinder Kit Standard Bore 30011-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...9310596- SKU:
- 9310596
- Availability:
- Ships Same Business Day
- Weight:
- 4.25 LBS
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 96,00 MM
- STYLE:
- STANDARD
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 13.2:1
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- CYLINDER DIAMETER METRIC:
- 96.00 MM
- DISPLACEMENT:
- 449 CC
- RIDING STYLE:
- OFF-ROAD
MSRP: $569.95Now: $512.96Was: $569.95 -
On Sale
CYLINDER WORKS Cylinder Kit - Standard Bore 30011-K03
CYLINDER WORKS
MSRP: $569.95Now: $520.16Was: $577.95CYLINDER WORKS Cylinder Kit Standard Bore 30011-K03Ready-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...9310600- SKU:
- 9310600
- Availability:
- Ships Same Business Day
- Weight:
- 4.20 LBS
- DISPLACEMENT:
- 449 CC
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- STANDARD
- CYLINDER DIAMETER METRIC:
- 96.00 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 12.8:1
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 96,00 MM
MSRP: $569.95Now: $520.16Was: $577.95 -
On Sale
CYLINDER WORKS Cylinder - Standard 30006-K01
CYLINDER WORKS
MSRP: $589.95Now: $530.96Was: $589.95CYLINDER WORKS Cylinder Standard 30006-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 engine...9310423- SKU:
- 9310423
- Availability:
- Ships Same Business Day
- Weight:
- 3.25 LBS
- STYLE:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 77,00 MM
- PRODUCT NAME:
- CYLINDER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- CYLINDER DIAMETER METRIC:
- 77.00 MM
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 4-CYCLE
MSRP: $589.95Now: $530.96Was: $589.95 -
On Sale
CYLINDER WORKS Cylinder Kit - Standard 10004-K02
CYLINDER WORKS
MSRP: $479.95Now: $431.96Was: $479.95CYLINDER WORKS Cylinder Kit Standard 10004-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...9310486- SKU:
- 9310486
- Availability:
- Ships Same Business Day
- Weight:
- 2.85 LBS
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- STYLE:
- STANDARD
- UNITS:
- KIT
- CYLINDER DIAMETER:
- 66,00 MM
- DISPLACEMENT:
- 149 CC
- COMPRESSION RATIO IMPERIAL:
- 11.7:1
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- CYLINDER DIAMETER METRIC:
- 66.00 MM
- RIDING STYLE:
- OFF-ROAD
MSRP: $479.95Now: $431.96Was: $479.95 -
On Sale
CYLINDER WORKS Cylinder Kit - Standard 51004-K01
CYLINDER WORKS
MSRP: $828.95Now: $761.36Was: $845.95CYLINDER WORKS Cylinder Kit Standard 51004-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...9310491- SKU:
- 9310491
- Availability:
- Ships Same Business Day
- Weight:
- 3.54 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 13.9:1
- 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:
- BIG BORE
MSRP: $828.95Now: $761.36Was: $845.95 -
On Sale
CYLINDER WORKS Cylinder - Standard - CRF450R 10006
CYLINDER WORKS
MSRP: $445.95Now: $401.36Was: $445.95CYLINDER WORKS Cylinder Standard CRF450R 10006Ready-to-install, direct bolt-on cylinders require no re-plating and look virtually identical to the OEM cylinders, Nickel Silicon Carbide plated for long life, Big bore cylinders do not require machine work,...9310391- SKU:
- 9310391
- Availability:
- Ships Same Business Day
- Weight:
- 3.20 LBS
- BORE SIZE METRIC:
- 96.00 MM
- STYLE:
- STANDARD
- CYLINDER DIAMETER:
- 96,00 MM
- PRODUCT NAME:
- CYLINDER
- CYLINDER DIAMETER METRIC:
- 96.00 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- ENGINE TYPE:
- 4-CYCLE
MSRP: $445.95Now: $401.36Was: $445.95 -
On Sale
CYLINDER WORKS Cylinder - Standard - CRF250R 10007
CYLINDER WORKS
MSRP: $333.95Now: $306.86Was: $340.95CYLINDER WORKS Cylinder Standard CRF250R 10007Ready-to-install, direct bolt-on cylinders require no re-plating and look virtually identical to the OEM cylinders, Nickel Silicon Carbide plated for long life, Big bore cylinders do not require machine work,...9310392- SKU:
- 9310392
- Availability:
- Ships Same Business Day
- Weight:
- 2.75 LBS
- BORE SIZE METRIC:
- 76.80 MM
- CYLINDER DIAMETER:
- 76,80 MM
- STYLE:
- STANDARD
- ENGINE TYPE:
- 4-CYCLE
- CYLINDER DIAMETER METRIC:
- 76.80 MM
- UNITS:
- EACH
- PRODUCT NAME:
- CYLINDER
- RIDING STYLE:
- OFF-ROAD
MSRP: $333.95Now: $306.86Was: $340.95 -
On Sale
CYLINDER WORKS Cylinder - Standard - RMZ250 - 2007-2009 40003
CYLINDER WORKS
MSRP: $377.95Now: $347.36Was: $385.95CYLINDER WORKS Cylinder Standard RMZ250 2007-2009 40003Ready-to-install, direct bolt-on cylinders require no re-plating and look virtually identical to the OEM cylinders, Nickel Silicon Carbide plated for long life, Big bore cylinders do not require...9310401- SKU:
- 9310401
- Availability:
- Ships Same Business Day
- Weight:
- 2.50 LBS
- BORE SIZE METRIC:
- 77.00 MM
- CYLINDER DIAMETER:
- 77,00 MM
- PRODUCT NAME:
- CYLINDER
- CYLINDER DIAMETER METRIC:
- 77.00 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- ENGINE TYPE:
- 4-CYCLE
- STYLE:
- STANDARD
MSRP: $377.95Now: $347.36Was: $385.95 -
On Sale
CYLINDER WORKS Cylinder - Standard - RMZ250 - 2010-2012 40004
CYLINDER WORKS
MSRP: $366.95Now: $336.56Was: $373.95CYLINDER WORKS Cylinder Standard RMZ250 2010-2012 40004Ready-to-install, direct bolt-on cylinders require no re-plating and look virtually identical to the OEM cylinders, Nickel Silicon Carbide plated for long life, Big bore cylinders do not require...9310402- SKU:
- 9310402
- Availability:
- Ships Same Business Day
- Weight:
- 2.55 LBS
- STYLE:
- STANDARD
- BORE SIZE METRIC:
- 44.00 MM
- ENGINE TYPE:
- 4-CYCLE
- UNITS:
- EACH
- PRODUCT NAME:
- CYLINDER
- RIDING STYLE:
- OFF-ROAD
MSRP: $366.95Now: $336.56Was: $373.95
