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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JE PISTONS Piston Kit - M8 370245
JE PISTONS
$449.99JE PISTONS Piston Kit M8 370245Forged from 2618-T6 aluminum for better aligned grain flow and higher tensile strength, Skirt coating aids in optimal break-in for performance longevity, High 11.0:1 compression ratio for improved performance, Accumulator...09106009- SKU:
- 09106009
- Availability:
- Ships Same Business Day
- Weight:
- 3.25 LBS
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- DISPLACEMENT:
- 117'
- STROKE LENGTH IMPERIAL:
- 4.375'
- BORE SIZE IMPERIAL:
- 4.125'
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
$449.99 -
JE PISTONS Piston Kit - M8 370246
JE PISTONS
$449.99JE PISTONS Piston Kit M8 370246Forged from 2618-T6 aluminum for better aligned grain flow and higher tensile strength, Skirt coating aids in optimal break-in for performance longevity, High 11.0:1 compression ratio for improved performance, Accumulator...09106010- SKU:
- 09106010
- Availability:
- Ships Same Business Day
- Weight:
- 3.30 LBS
- STROKE LENGTH IMPERIAL:
- 4.375'
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- BORE SIZE IMPERIAL:
- 4.250'
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- DISPLACEMENT:
- 124'
- UNITS:
- KIT
$449.99 -
JE PISTONS Piston Kit - Milwaukee Eight 370247
JE PISTONS
$449.99JE PISTONS Piston Kit Milwaukee Eight 370247Forged from 2618-T6 aluminum for better aligned grain flow and higher tensile strength, Skirt coating aids in optimal break-in for performance longevity, High 11.0:1 compression ratio for improved performance,...09106011- SKU:
- 09106011
- Availability:
- Ships Same Business Day
- Weight:
- 3.00 LBS
- STROKE LENGTH IMPERIAL:
- 4.500'
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- BORE SIZE IMPERIAL:
- 4.016'
- PRODUCT NAME:
- PISTON KIT
- DISPLACEMENT:
- 114'
- RIDING STYLE:
- STREET
$449.99 -
JE PISTONS Piston Kit - M8 370248
JE PISTONS
$449.99JE PISTONS Piston Kit M8 370248Forged from 2618-T6 aluminum for better aligned grain flow and higher tensile strength, Skirt coating aids in optimal break-in for performance longevity, High 11.0:1 compression ratio for improved performance, Accumulator...09106012- SKU:
- 09106012
- Availability:
- Ships Same Business Day
- Weight:
- 3.05 LBS
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 4.020'
- STROKE LENGTH IMPERIAL:
- 4.500'
- DISPLACEMENT:
- 114'
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
$449.99 -
JE PISTONS Piston Kit - M8 370249
JE PISTONS
$449.99JE PISTONS Piston Kit M8 370249Forged from 2618-T6 aluminum for better aligned grain flow and higher tensile strength, Skirt coating aids in optimal break-in for performance longevity, High 11.0:1 compression ratio for improved performance, Accumulator...09106013- SKU:
- 09106013
- Availability:
- Ships Same Business Day
- Weight:
- 3.10 LBS
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- DISPLACEMENT:
- 117'
- UNITS:
- KIT
- STROKE LENGTH IMPERIAL:
- 4.500'
- BORE SIZE IMPERIAL:
- 4.075'
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
$449.99 -
JE PISTONS Piston Kit - M8 370250
JE PISTONS
$449.99JE PISTONS Piston Kit M8 370250Forged from 2618-T6 aluminum for better aligned grain flow and higher tensile strength, Skirt coating aids in optimal break-in for performance longevity, High 11.0:1 compression ratio for improved performance, Accumulator...09106014- SKU:
- 09106014
- Availability:
- Ships Same Business Day
- Weight:
- 3.10 LBS
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 4.080'
- DISPLACEMENT:
- 118'
- STROKE LENGTH IMPERIAL:
- 4.500'
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
$449.99 -
JE PISTONS Piston Kit - M8 370251
JE PISTONS
$449.99JE PISTONS Piston Kit M8 370251Forged from 2618-T6 aluminum for better aligned grain flow and higher tensile strength, Skirt coating aids in optimal break-in for performance longevity, High 11.0:1 compression ratio for improved performance, Accumulator...09106015- SKU:
- 09106015
- Availability:
- Ships Same Business Day
- Weight:
- 3.20 LBS
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- DISPLACEMENT:
- 120'
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4.500'
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 4.125'
- PRODUCT NAME:
- PISTON KIT
$449.99 -
JE PISTONS Piston Kit - M8 370252
JE PISTONS
$449.99JE PISTONS Piston Kit M8 370252Forged from 2618-T6 aluminum for better aligned grain flow and higher tensile strength, Skirt coating aids in optimal break-in for performance longevity, High 11.0:1 compression ratio for improved performance, Accumulator...09106016- SKU:
- 09106016
- Availability:
- Ships Same Business Day
- Weight:
- 3.05 LBS
- BORE SIZE IMPERIAL:
- 4.250'
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- UNITS:
- KIT
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- DISPLACEMENT:
- 128'
- STROKE LENGTH IMPERIAL:
- 4.500'
$449.99 -
JE PISTONS Piston Kit 208552
JE PISTONS
$309.99JE PISTONS Piston Kit 208552Machined 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...09105830- SKU:
- 09105830
- Availability:
- Ships Same Business Day
- Weight:
- 1.35 LBS
- BORE SIZE METRIC:
- 89.00 MM
- DISPLACEMENT:
- 435 CC
- PRODUCT NAME:
- PISTON KIT
- WALL THICKNESS IMPERIAL:
- 0.180'
- WALL THICKNESS:
- 0,180'
- COMPRESSION RATIO IMPERIAL:
- 12.0:1
- PISTON HEAD SHAPE:
- DOMED
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$309.99 -
JE PISTONS Piston Kit 128995
JE PISTONS
$254.63JE PISTONS Piston Kit 128995Machined 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...09105831- SKU:
- 09105831
- Availability:
- Ships Same Business Day
- Weight:
- 1.45 LBS
- BORE - OVERSIZE METRIC:
- +3.00 MM
- BORE SIZE METRIC:
- 100.00 MM
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- PRODUCT NAME:
- PISTON KIT
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- PISTON HEAD SHAPE:
- FLAT TOP
- DISPLACEMENT:
- 629 CC
- TYPE:
- ROUND FORGED DESIGN
- BORE - OVERSIZE:
- +3,00 MM
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- JE PISTON
- UNITS:
- KIT
$254.63 -
JE PISTONS Piston Kit 128996
JE PISTONS
$269.99JE PISTONS Piston Kit 128996Machined 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...09105832- SKU:
- 09105832
- Availability:
- Ships Same Business Day
- Weight:
- 1.50 LBS
- BORE - OVERSIZE:
- +4,00 MM
- PISTON HEAD SHAPE:
- FLAT TOP
- BORE - OVERSIZE METRIC:
- +4.00 MM
- BORE SIZE METRIC:
- 101.00 MM
- COMPRESSION RATIO IMPERIAL:
- 10.6:1
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- ROUND FORGED DESIGN
- UNITS:
- KIT
- DISPLACEMENT:
- 640 CC
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- PRODUCT NAME:
- PISTON KIT
- STYLE:
- JE PISTON
$269.99 -
JE PISTONS Piston Kit 128998
JE PISTONS
$269.99JE PISTONS Piston Kit 128998Machined 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...09105833- SKU:
- 09105833
- Availability:
- Ships Same Business Day
- Weight:
- 1.55 LBS
- BORE - OVERSIZE:
- +5,00 MM
- BORE SIZE METRIC:
- 102.00 MM
- PRODUCT NAME:
- PISTON KIT
- DISPLACEMENT:
- 654 CC
- PISTON HEAD SHAPE:
- FLAT TOP
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- STYLE:
- JE PISTON
- COMPRESSION RATIO IMPERIAL:
- 10.8:1
- TYPE:
- ROUND FORGED DESIGN
- UNITS:
- KIT
- BORE - OVERSIZE METRIC:
- +5.00 MM
- RIDING STYLE:
- OFF-ROAD
$269.99 -
JE PISTONS Piston Kit 130682
JE PISTONS
$269.99JE PISTONS Piston Kit 130682Machined 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...09105834- SKU:
- 09105834
- Availability:
- Ships Same Business Day
- Weight:
- 1.60 LBS
- PISTON HEAD SHAPE:
- FLAT TOP
- TYPE:
- ROUND FORGED DESIGN
- BORE SIZE METRIC:
- 100.00 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE - OVERSIZE:
- STANDARD
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- PRODUCT NAME:
- PISTON KIT
- STYLE:
- JE PISTON
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 11.25:1
- DISPLACEMENT:
- 644 CC
$269.99 -
JE PISTONS Piston Kit 131243
JE PISTONS
$269.99JE PISTONS Piston Kit 131243Machined 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...09105836- SKU:
- 09105836
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- PISTON HEAD SHAPE:
- DOMED
- STYLE:
- JE PISTON
- TYPE:
- ROUND FORGED DESIGN
- UNITS:
- KIT
- DISPLACEMENT:
- 277 CC
- BORE - OVERSIZE:
- +4,00 MM
- BORE SIZE METRIC:
- 77.00 MM
- BORE - OVERSIZE METRIC:
- +4.00 MM
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
$269.99 -
JE PISTONS Piston Kit 132699
JE PISTONS
$269.99JE PISTONS Piston Kit 132699Machined 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...09105837- SKU:
- 09105837
- Availability:
- Ships Same Business Day
- Weight:
- 1.20 LBS
- BORE - OVERSIZE METRIC:
- +1.00 MM
- PISTON HEAD SHAPE:
- DOMED
- STYLE:
- JE PISTON
- TYPE:
- ROUND FORGED DESIGN
- UNITS:
- KIT
- BORE - OVERSIZE:
- +1,00 MM
- DISPLACEMENT:
- 406 CC
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ATV
- BORE SIZE METRIC:
- 86.00 MM
- COMPRESSION RATIO IMPERIAL:
- 10.6:1
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
$269.99 -
JE PISTONS Piston Kit 133889
JE PISTONS
$269.99JE PISTONS Piston Kit 133889Machined 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...09105838- SKU:
- 09105838
- Availability:
- Ships Same Business Day
- Weight:
- 1.20 LBS
- BORE - OVERSIZE METRIC:
- +2.00 MM
- BORE SIZE METRIC:
- 87.00 MM
- DISPLACEMENT:
- 415 CC
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- JE PISTON
- UNITS:
- KIT
- BORE - OVERSIZE:
- +2,00 MM
- COMPRESSION RATIO IMPERIAL:
- 10.8:1
- PISTON HEAD SHAPE:
- DOMED
- TYPE:
- ROUND FORGED DESIGN
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- PRODUCT NAME:
- PISTON KIT
$269.99 -
JE PISTONS Piston Kit 139550
JE PISTONS
$269.99JE PISTONS Piston Kit 139550Machined 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...09105839- SKU:
- 09105839
- Availability:
- Ships Same Business Day
- Weight:
- 1.45 LBS
- BORE - OVERSIZE METRIC:
- +2.00 MM
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- JE PISTON
- UNITS:
- KIT
- BORE - OVERSIZE:
- +2,00 MM
- COMPRESSION RATIO IMPERIAL:
- 11.25:1
- DISPLACEMENT:
- 657 CC
- TYPE:
- ROUND FORGED DESIGN
- PISTON HEAD SHAPE:
- FLAT TOP
- BORE SIZE METRIC:
- 102.00 MM
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- PRODUCT NAME:
- PISTON KIT
$269.99 -
JE PISTONS Piston Kit 177239
JE PISTONS
$269.99JE PISTONS Piston Kit 177239Machined 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...09105840- SKU:
- 09105840
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
- BORE - OVERSIZE:
- +3,00 MM
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- JE PISTON
- UNITS:
- KIT
- DISPLACEMENT:
- 426 CC
- PISTON HEAD SHAPE:
- DOMED
- TYPE:
- ROUND FORGED DESIGN
- BORE - OVERSIZE METRIC:
- +3.00 MM
- BORE SIZE METRIC:
- 88.00 MM
- COMPRESSION RATIO IMPERIAL:
- 13.0:1
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- PRODUCT NAME:
- PISTON KIT
$269.99 -
JE PISTONS Piston Kit 177240
JE PISTONS
$269.99JE PISTONS Piston Kit 177240Machined 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...09105841- SKU:
- 09105841
- Availability:
- Ships Same Business Day
- Weight:
- 1.20 LBS
- BORE - OVERSIZE:
- +3,00 MM
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- RIDING STYLE:
- OFF-ROAD
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- STYLE:
- JE PISTON
- DISPLACEMENT:
- 426 CC
- PISTON HEAD SHAPE:
- DOMED
- TYPE:
- ROUND FORGED DESIGN
- UNITS:
- KIT
- BORE - OVERSIZE METRIC:
- +3.00 MM
- BORE SIZE METRIC:
- 88.00 MM
- PRODUCT NAME:
- PISTON KIT
$269.99 -
JE PISTONS Piston Kit 180297
JE PISTONS
$269.99JE PISTONS Piston Kit 180297Machined 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...09105842- SKU:
- 09105842
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
- BORE - OVERSIZE:
- STANDARD
- DISPLACEMENT:
- 398 CC
- RIDING STYLE:
- ATV
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- STYLE:
- JE PISTON
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 12.0:1
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- ROUND FORGED DESIGN
- UNITS:
- KIT
- BORE SIZE METRIC:
- 90.00 MM
- PISTON HEAD SHAPE:
- DISHED
- PRODUCT NAME:
- PISTON KIT
$269.99
