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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On Sale
CYLINDER WORKS Big Bore Gasket Kit 31011-G01
CYLINDER WORKS
MSRP: $89.95Now: $58.47Was: $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...09344056- SKU:
- 09344056
- 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: $58.47Was: $89.95 -
On Sale
CYLINDER WORKS Cylinder Head Kit CH1001-K01
CYLINDER WORKS
MSRP: $429.95Now: $395.06Was: $441.95CYLINDER 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,...09300127- SKU:
- 09300127
- 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: $441.95 -
On Sale
CYLINDER WORKS Cylinder Head Kit CH1002-K01
CYLINDER WORKS
MSRP: $429.95Now: $395.06Was: $441.95CYLINDER 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,...09300128- SKU:
- 09300128
- 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: $441.95 -
On Sale
CYLINDER WORKS Cylinder Head Kit CH1003-K01
CYLINDER WORKS
MSRP: $409.95Now: $376.16Was: $420.95CYLINDER 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,...09300129- SKU:
- 09300129
- 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: $420.95 -
On Sale
CYLINDER WORKS Cylinder Head Kit CH2001-K01
CYLINDER WORKS
MSRP: $215.95Now: $197.96Was: $221.95CYLINDER 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,...09300130- SKU:
- 09300130
- 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: $221.95 -
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...09310584- SKU:
- 09310584
- 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: $572.95CYLINDER 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...09310592- SKU:
- 09310592
- 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: $572.95 -
On Sale
CYLINDER WORKS Cylinder Kit - Standard Bore 30011-K01
CYLINDER WORKS
MSRP: $569.95Now: $512.96Was: $570.95CYLINDER 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...09310596- SKU:
- 09310596
- 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: $570.95 -
On Sale
CYLINDER WORKS Cylinder Kit - Standard Bore 30011-K03
CYLINDER WORKS
MSRP: $569.95Now: $520.16Was: $581.95CYLINDER 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...09310600- SKU:
- 09310600
- 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: $581.95 -
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...09310423- SKU:
- 09310423
- 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...09310486- SKU:
- 09310486
- 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: $851.95CYLINDER 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...09310491- SKU:
- 09310491
- 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: $851.95 -
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,...09310391- SKU:
- 09310391
- 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: $343.95CYLINDER 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,...09310392- SKU:
- 09310392
- 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: $343.95 -
On Sale
CYLINDER WORKS Cylinder - Standard - RMZ250 - 2007-2009 40003
CYLINDER WORKS
MSRP: $377.95Now: $347.36Was: $388.95CYLINDER 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...09310401- SKU:
- 09310401
- 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: $388.95 -
On Sale
CYLINDER WORKS Cylinder - Standard - RMZ250 - 2010-2012 40004
CYLINDER WORKS
MSRP: $366.95Now: $336.56Was: $376.95CYLINDER 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...09310402- SKU:
- 09310402
- 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: $376.95 -
On Sale
CYLINDER WORKS Cylinder Kit - Standard Bore 50001-K01
CYLINDER WORKS
MSRP: $711.95Now: $653.36Was: $730.95CYLINDER WORKS Cylinder Kit Standard Bore 50001-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...09310406- SKU:
- 09310406
- Availability:
- Ships Same Business Day
- Weight:
- 3.80 LBS
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- DISPLACEMENT:
- 350 CC
- STYLE:
- STANDARD
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- CYLINDER DIAMETER:
- 88,00 MM
- CYLINDER DIAMETER METRIC:
- 88.00 MM
MSRP: $711.95Now: $653.36Was: $730.95 -
On Sale
CYLINDER WORKS Cylinder Kit - Big Bore 51001-K01
CYLINDER WORKS
MSRP: $805.95Now: $739.76Was: $827.95CYLINDER WORKS Cylinder Kit Big Bore 51001-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...09310410- SKU:
- 09310410
- Availability:
- Ships Same Business Day
- Weight:
- 3.64 LBS
- DISPLACEMENT:
- 365 CC
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- CYLINDER DIAMETER:
- 90,00 MM
- ENGINE TYPE:
- 4-CYCLE
- OVERBORE METRIC:
- +2.00 MM
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER METRIC:
- 90.00 MM
MSRP: $805.95Now: $739.76Was: $827.95 -
On Sale
CYLINDER WORKS Cylinder Kit - Big Bore 51002-K01
CYLINDER WORKS
MSRP: $805.95Now: $739.76Was: $827.95CYLINDER WORKS Cylinder Kit Big Bore 51002-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...09310411- SKU:
- 09310411
- Availability:
- Ships Same Business Day
- Weight:
- 3.26 LBS
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- DISPLACEMENT:
- 276 CC
- OVERBORE METRIC:
- +3.00 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 13.3:1
- CYLINDER DIAMETER:
- 80,00 MM
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- CYLINDER DIAMETER METRIC:
- 80.00 MM
MSRP: $805.95Now: $739.76Was: $827.95 -
On Sale
CYLINDER WORKS Cylinder Kit - Standard 10006-K01
CYLINDER WORKS
MSRP: $589.95Now: $530.96Was: $589.95CYLINDER WORKS Cylinder Kit Standard 10006-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...09310273- SKU:
- 09310273
- Availability:
- Ships Same Business Day
- Weight:
- 4.20 LBS
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 96,00 MM
- UNITS:
- KIT
- CYLINDER DIAMETER METRIC:
- 96.00 MM
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 12.0:1
- DISPLACEMENT:
- 449 CC
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
MSRP: $589.95Now: $530.96Was: $589.95Qty in Cart: 0Quantity:Price:MSRP: $589.95Now: $530.96Was: $589.95Subtotal:
