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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JE PISTONS Piston Kit 345200
JE PISTONS
$424.99JE PISTONS Piston Kit 345200Machined from 2618-T6 high-tensile forged aluminum, Dome/dish features smooth flowing radii; requires no deburring or preparation, Specifically engineered for extreme applications including professional competition, Pro Series...09105948- SKU:
- 09105948
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 249 CC
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- BORE - OVERSIZE:
- STANDARD
- BORE SIZE METRIC:
- 77.00 MM
- PRODUCT NAME:
- PISTON KIT
- STYLE:
- PRO SERIES
- RIDING STYLE:
- OFF-ROAD
- COMPRESSION RATIO IMPERIAL:
- 14.0:1
- PISTON HEAD SHAPE:
- DOMED
- TYPE:
- FORGED SIDE RELIEF DESIGN
- UNITS:
- KIT
$424.99 -
JE PISTONS Piston Kit 345055
JE PISTONS
$424.99JE PISTONS Piston Kit 345055Machined from 2618-T6 high-tensile forged aluminum, Dome/dish features smooth flowing radii; requires no deburring or preparation, Specifically engineered for extreme applications including professional competition, Pro Series...09105944- SKU:
- 09105944
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
- BORE - OVERSIZE:
- STANDARD
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- PRO SERIES
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- TYPE:
- FORGED SIDE RELIEF DESIGN
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 14.0:1
- DISPLACEMENT:
- 449 CC
- PISTON HEAD SHAPE:
- DOMED
- UNITS:
- KIT
- BORE SIZE METRIC:
- 96.00 MM
- PRODUCT NAME:
- PISTON KIT
$424.99 -
JE PISTONS Piston Kit 130798
JE PISTONS
$269.99JE PISTONS Piston Kit 130798Machined from 2618-T6 high-tensile forged aluminum, Dome/dish features smooth flowing radii; requires no deburring or preparation, Specifically engineered for extreme applications including professional competition, Pro Series...09105835- SKU:
- 09105835
- Availability:
- Ships Same Business Day
- Weight:
- 1.30 LBS
- DISPLACEMENT:
- 540 CC
- PISTON HEAD SHAPE:
- DOMED
- TYPE:
- ROUND FORGED DESIGN
- BORE - OVERSIZE METRIC:
- +3.00 MM
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- STYLE:
- JE PISTON
- BORE - OVERSIZE:
- +3,00 MM
- BORE SIZE METRIC:
- 90.00 MM
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$269.99 -
On Sale
DRAG SPECIALTIES Pistons - M8 21900049-020
DRAG SPECIALTIES
MSRP: $136.95Now: $88.00Was: $136.95DRAG SPECIALTIES Pistons M8 21900049-020Piston for M8 models09110052- SKU:
- 09110052
- Availability:
- Ships Same Business Day
- Weight:
- 2.40 LBS
- BORE OVERSIZE - IMPERIAL:
- +0.020'
- BORE SIZE IMPERIAL:
- 3.937'
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- DISPLACEMENT:
- 107'
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- CAST
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- BORE - OVERSIZE:
- +0,020'
- UNITS:
- KIT
MSRP: $136.95Now: $88.00Was: $136.95 -
CYLINDER WORKS Big Bore Gasket Kit 11001-G01
CYLINDER WORKS
$64.95CYLINDER WORKS Big Bore Gasket Kit 11001-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...09341521- SKU:
- 09341521
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- TOP END
- BORE SIZE METRIC:
- OVERSIZED (+3.00 MM)
- MATERIAL:
- NICKEL SILICON CARBIDE
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- BIG BORE
$64.95 -
CYLINDER WORKS Big Bore Gasket Kit 11002-G01
CYLINDER WORKS
$77.95CYLINDER WORKS Big Bore Gasket Kit 11002-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...09341522- SKU:
- 09341522
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- MATERIAL:
- NICKEL SILICON CARBIDE
- UNITS:
- KIT
- TYPE:
- TOP END
- BORE SIZE METRIC:
- OVERSIZE (+4.00 MM)
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- BIG BORE
$77.95 -
CYLINDER WORKS Big Bore Gasket Kit 21002-G01
CYLINDER WORKS
$86.95CYLINDER WORKS Big Bore Gasket Kit 21002-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...09341523- SKU:
- 09341523
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- MATERIAL:
- NICKEL SILICON CARBIDE
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET KIT
- STYLE:
- BIG BORE
- BORE SIZE METRIC:
- OVERSIZED (+3.00 MM)
- TYPE:
- TOP END
$86.95 -
CYLINDER WORKS Big Bore Gasket Kit 31001-G01
CYLINDER WORKS
$94.95CYLINDER WORKS Big Bore Gasket Kit 31001-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...09341525- SKU:
- 09341525
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- MATERIAL:
- NICKEL SILICON CARBIDE
- STYLE:
- BIG BORE
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
- BORE SIZE METRIC:
- OVERSIZED (+3.00 MM)
- TYPE:
- TOP END
$94.95 -
ATHENA Water Pump Gasket Kit - Suzuki P400510475004
ATHENA
$39.95ATHENA Water Pump Gasket Kit Suzuki P400510475004Include water pump gasket, clutch cover gasket, water pump shaft oil seals and washers, Kit contents will vary slightly based on application, Kits do not contain replacement bearings09346083- SKU:
- 09346083
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- WATER PUMP
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$39.95 -
ATHENA Water Pump Gasket Kit - Yamaha P400485475002
ATHENA
$37.95ATHENA Water Pump Gasket Kit Yamaha P400485475002Include water pump gasket, clutch cover gasket, water pump shaft oil seals and washers, Kit contents will vary slightly based on application, Kits do not contain replacement bearings09346084- SKU:
- 09346084
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- WATER PUMP
$37.95 -
ATHENA Water Pump Gasket Kit - Yamaha P400485475003
ATHENA
$38.95ATHENA Water Pump Gasket Kit Yamaha P400485475003Include water pump gasket, clutch cover gasket, water pump shaft oil seals and washers, Kit contents will vary slightly based on application, Kits do not contain replacement bearings09346085- SKU:
- 09346085
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- WATER PUMP
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$38.95Qty in Cart: 0Quantity:Price:$38.95Subtotal: -
ATHENA Water Pump Gasket Kit - Yamaha P400485475004
ATHENA
$34.95ATHENA Water Pump Gasket Kit Yamaha P400485475004Include water pump gasket, clutch cover gasket, water pump shaft oil seals and washers, Kit contents will vary slightly based on application, Kits do not contain replacement bearings09346086- SKU:
- 09346086
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- WATER PUMP
$34.95Qty in Cart: 0Quantity:Price:$34.95Subtotal: -
ATHENA Water Pump Gasket Kit - Yamaha P400485475005
ATHENA
$34.95ATHENA Water Pump Gasket Kit Yamaha P400485475005Include water pump gasket, clutch cover gasket, water pump shaft oil seals and washers, Kit contents will vary slightly based on application, Kits do not contain replacement bearings09346087- SKU:
- 09346087
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET KIT
$34.95Qty in Cart: 0Quantity:Price:$34.95Subtotal: -
ATHENA Water Pump Gasket Kit - Yamaha P400485475006
ATHENA
$37.95ATHENA Water Pump Gasket Kit Yamaha P400485475006Include water pump gasket, clutch cover gasket, water pump shaft oil seals and washers, Kit contents will vary slightly based on application, Kits do not contain replacement bearings09346088- SKU:
- 09346088
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- OFF-ROAD
$37.95 -
ATHENA Gasket Kit - CRF230F P400210160316
ATHENA
$37.95ATHENA Gasket Kit CRF230F P400210160316Kits 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...09344814- SKU:
- 09344814
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- BORE SIZE METRIC:
- 67.00 MM
- DISPLACEMENT:
- 233 CC
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
- BORE SIZE:
- 67,00 MM
- PRODUCT NAME:
- GASKET KIT
$37.95 -
ATHENA Top End Gasket Kit - Honda P400210600304
ATHENA
$38.95ATHENA Top End Gasket Kit Honda P400210600304Specifically designed for the pro, semi-pro and amateur rider who freshens up their engine prior to a race or during midseason. Gives the rider a choice of using standard gas with stock compression, or race...09344815- SKU:
- 09344815
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
$38.95 -
ATHENA Top End Gasket Kit - Yamaha P400485600004
ATHENA
$12.95ATHENA Top End Gasket Kit Yamaha P400485600004Specifically designed for the pro, semi-pro and amateur rider who freshens up their engine prior to a race or during midseason. Gives the rider a choice of using standard gas with stock compression, or race...09344818- SKU:
- 09344818
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
$12.95 -
ATHENA Top End Gasket Kit P400210600065
ATHENA
$42.95ATHENA Top End Gasket Kit P400210600065Specifically designed for the pro, semi-pro and amateur rider who freshens up their engine prior to a race or during midseason. Gives the rider a choice of using standard gas with stock compression, or race gas with...09340200- SKU:
- 09340200
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET KIT
- MATERIAL:
- RUBBER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- TOP END
$42.95 -
ATHENA Complete Gasket Kit - Kawasaki P400250850015
ATHENA
$102.95ATHENA Complete Gasket Kit Kawasaki P400250850015Superior-quality gasket sets from Athena, Head gaskets feature rubber-coated spring steel construction, Soft steel base gaskets are rubber coated, Steel core materials feature high springback and superior...09340203- SKU:
- 09340203
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
$102.95Qty in Cart: 0Quantity:Price:$102.95Subtotal: -
ATHENA Top End Gasket Kit - KTM/Husqvarna P400270600090
ATHENA
$72.95ATHENA Top End Gasket Kit KTM/Husqvarna P400270600090Specifically designed for the pro, semi-pro and amateur rider who freshens up their engine prior to a race or during midseason. Gives the rider a choice of using standard gas with stock compression, or...09346351- SKU:
- 09346351
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- TOP END
- RIDING STYLE:
- STREET
$72.95
