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
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
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JAMES GASKET Rocker Cover Gasket - XL 17030-89-X
JAMES GASKET
$91.95JAMES GASKET Rocker Cover Gasket XL 17030-89-XMade in the U.S.A.9341852- SKU:
- 9341852
- Availability:
- Ships Same Business Day
- Weight:
- 0.34 LBS
- RIDING STYLE:
- STREET
- TYPE:
- ROCKER BOX
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
$91.95 -
JAMES GASKET Keihin Carb Rebuild Kit - CV 27006-88
JAMES GASKET
$60.95JAMES GASKET Keihin Carb Rebuild Kit CV 27006-88Includes all the necessary needles, O-rings, seals and gaskets etc. for a complete rebuildDS289109- SKU:
- DS289109
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- TYPE:
- CARBURETOR REBUILD
$60.95 -
JAMES GASKET Trans Cover Gasket with Seal - FXD 34917-90-X
JAMES GASKET
$38.64JAMES GASKET Trans Cover Gasket with Seal FXD 34917-90-XMade in the U.S.A.DS173193- SKU:
- DS173193
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- TYPE:
- TRANSMISSION TOP COVER
- FEATURES:
- BEADED
- PRODUCT NAME:
- GASKET
- UNITS:
- 5 PACK
$38.64 -
JAMES GASKET Air Cleaner Gasket - Twin Cam 29583-01-A
JAMES GASKET
$17.60JAMES GASKET Air Cleaner Gasket Twin Cam 29583-01-AMade in the U.S.A.9341617- SKU:
- 9341617
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- MATERIAL:
- SILICONE
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0.060'
- UNITS:
- 10 PACK
- STYLE:
- AIR CLEANER
- THICKNESS:
- 1,52 MM (0,060')
- TYPE:
- BACKPLATE
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 1.52 MM
$17.60 -
JAMES GASKET Primary Seal/Gasket Kit 34955-04-K
JAMES GASKET
$39.95JAMES GASKET Primary Seal/Gasket Kit 34955-04-KTop quality gaskets, seals and o-rings meet or exceed OEM specifications, Primary gasket features silicone beading, Made in the U.S.A.9340952- SKU:
- 9340952
- Availability:
- Ships Same Business Day
- Weight:
- 0.32 LBS
- RIDING STYLE:
- STREET
- MATERIAL:
- SILICONE
- TYPE:
- PRIMARY COVER
- UNITS:
- KIT
- FEATURES:
- BEADED
- MATERIAL:
- PAPER
- PRODUCT NAME:
- GASKET KIT
$39.95 -
JAMES GASKET Inner Primary Seal - Twin Cam 12052-A
JAMES GASKET
$20.82JAMES GASKET Inner Primary Seal Twin Cam 12052-AMade in the U.S.A.9350121- SKU:
- 9350121
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- APPLICATION:
- INNER PRIMARY
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SEAL
- UNITS:
- 5 PACK
$20.82 -
JAMES GASKET Primary Cover Gasket 34901-07
JAMES GASKET
$107.87JAMES GASKET Primary Cover Gasket 34901-07Top quality gaskets, seals and o-rings meet or exceed OEM specifications, Primary gasket features silicone beading, Made in the U.S.A.9341622- SKU:
- 9341622
- Availability:
- Ships Same Business Day
- Weight:
- 0.47 LBS
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- STYLE:
- PRIMARY
- UNITS:
- 5 PACK
- TYPE:
- COVER
- MATERIAL:
- SILICONE
$107.87 -
JE PISTONS Piston Kit - 95" - Twin Cam 324716
JE PISTONS
$449.99JE PISTONS Piston Kit 95" Twin Cam 324716Machined from 2618-T6 high-tensile forged aluminum, Dome/dish features smooth flowing radii; requires no deburring or preparation, JE designs are specifically engineered for extreme applications including...9105935- SKU:
- 9105935
- Availability:
- Ships Same Business Day
- Weight:
- 3.90 LBS
- DISPLACEMENT:
- 1545 CC
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- BORE SIZE IMPERIAL:
- 3.875'
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- UNITS:
- KIT
$449.99 -
JE PISTONS Piston Kit 324910
JE PISTONS
$329.99JE PISTONS Piston Kit 324910Machined 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...9105938- SKU:
- 9105938
- Availability:
- Ships Same Business Day
- Weight:
- 1.20 LBS
- DISPLACEMENT:
- 450 CC
- PRODUCT NAME:
- PISTON KIT
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- TYPE:
- FORGED SIDE RELIEF DESIGN
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 97.00 MM
- COMPRESSION RATIO IMPERIAL:
- 12.8:1
- PISTON HEAD SHAPE:
- DOMED
- UNITS:
- KIT
- BORE - OVERSIZE:
- STANDARD
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- PRO SERIES
$329.99 -
JE PISTONS Piston Kit 345192
JE PISTONS
$839.99JE PISTONS Piston Kit 345192Machined 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...9105946- SKU:
- 9105946
- Availability:
- Ships Same Business Day
- Weight:
- 2.90 LBS
- BORE SIZE METRIC:
- 80.00 MM
- PRODUCT NAME:
- PISTON KIT
- WALL THICKNESS:
- 0,160'
- DISPLACEMENT:
- 998 CC
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 9.5:1
- PISTON HEAD SHAPE:
- DISHED
- RIDING STYLE:
- UTV
- WALL THICKNESS IMPERIAL:
- 0.160'
$839.99 -
JE PISTONS Piston Kit - M8 370244
JE PISTONS
$449.99JE PISTONS Piston Kit M8 370244Forged 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...9106008- SKU:
- 9106008
- Availability:
- Ships Same Business Day
- Weight:
- 3.20 LBS
- PRODUCT NAME:
- PISTON KIT
- DISPLACEMENT:
- 114'
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.937'
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4.375'
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
$449.99 -
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...9106009- SKU:
- 9106009
- 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...9106010- SKU:
- 9106010
- 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,...9106011- SKU:
- 9106011
- 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...9106012- SKU:
- 9106012
- 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...9106013- SKU:
- 9106013
- 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...9106014- SKU:
- 9106014
- 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...9106015- SKU:
- 9106015
- 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...9106016- SKU:
- 9106016
- 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...9105830- SKU:
- 9105830
- 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
