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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PROX Piston Kit 01.2321.A
PROX
$138.41PROX Piston Kit 01.2321.AManufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances, Pistons supplied in a kit...PX7130A- SKU:
- PX7130A
- Availability:
- Ships Same Business Day
- Weight:
- 0.69 LBS
- ENGINE TYPE:
- 4-STROKE
- PISTON DIAMETER METRIC:
- 66.35 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- EACH
- PISTON SIZE METRIC:
- STANDARD SIZE A
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 66.35 MM
$138.41 -
PROX Piston Kit 01.2321.B
PROX
$138.41PROX Piston Kit 01.2321.BManufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances, Pistons supplied in a kit...PX7130B- SKU:
- PX7130B
- Availability:
- Ships Same Business Day
- Weight:
- 0.69 LBS
- BORE SIZE METRIC:
- 66.36 MM
- PISTON SIZE METRIC:
- STANDARD SIZE B
- RIDING STYLE:
- OFF-ROAD
- PISTON DIAMETER METRIC:
- 66.36 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- EACH
$138.41 -
PROX Piston Kit 01.2321.C
PROX
$138.41PROX Piston Kit 01.2321.CManufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances, Pistons supplied in a kit...PX7130C- SKU:
- PX7130C
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON SIZE METRIC:
- STANDARD SIZE C
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- PISTON DIAMETER METRIC:
- 66.37 MM
- BORE SIZE METRIC:
- 66.37 MM
- PRODUCT NAME:
- PISTON KIT
$138.41 -
PROX Piston Kit 01.2321.D
PROX
$138.41PROX Piston Kit 01.2321.DManufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances, Pistons supplied in a kit...PX7130D- SKU:
- PX7130D
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- BORE SIZE METRIC:
- 66.38 MM
- PISTON DIAMETER METRIC:
- 66.38 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON SIZE METRIC:
- STANDARD SIZE D
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- PRODUCT NAME:
- PISTON KIT
$138.41 -
PROX Piston Kit 01.2215.C
PROX
$118.37PROX Piston Kit 01.2215.CManufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances, Pistons supplied in a kit...PX7214C- SKU:
- PX7214C
- Availability:
- Ships Same Business Day
- Weight:
- 0.44 LBS
- BORE SIZE METRIC:
- 53.96 MM
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
- PISTON SIZE METRIC:
- +0.02 MM
- RIDING STYLE:
- OFF-ROAD
- PISTON DIAMETER METRIC:
- 53.96 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- UNITS:
- EACH
$118.37 -
On Sale
PROX Ring Set 02.2214
PROX
MSRP: $27.61Now: $17.95Was: $27.61PROX Ring Set 02.2214Manufactured in Japan and designed as OEM replacementsPX7214R- SKU:
- PX7214R
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- OFF-ROAD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- UNITS:
- SET
MSRP: $27.61Now: $17.95Was: $27.61 -
PROX Piston Kit 01.2217.A
PROX
$118.37PROX Piston Kit 01.2217.AManufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances, Pistons supplied in a kit...PX7215A- SKU:
- PX7215A
- Availability:
- Ships Same Business Day
- Weight:
- 0.44 LBS
- ENGINE TYPE:
- 2-STROKE
- PISTON SIZE METRIC:
- STANDARD
- PRODUCT NAME:
- PISTON KIT
- BORE SIZE METRIC:
- 53.95 MM
- PISTON DIAMETER METRIC:
- 53.95 MM
- RIDING STYLE:
- OFF-ROAD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- UNITS:
- EACH
$118.37 -
PROX Piston Kit 01.2217.B
PROX
$118.37PROX Piston Kit 01.2217.BManufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances, Pistons supplied in a kit...PX7215B- SKU:
- PX7215B
- Availability:
- Ships Same Business Day
- Weight:
- 0.44 LBS
- PISTON DIAMETER METRIC:
- 53.96 MM
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 53.96 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON SIZE METRIC:
- +0.01 MM
- PRODUCT NAME:
- PISTON KIT
- PISTON MATERIAL:
- ALUMINUM ALLOY
- UNITS:
- EACH
$118.37 -
PROX Piston Kit 01.2217.C
PROX
$118.37PROX Piston Kit 01.2217.CManufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances, Pistons supplied in a kit...PX7215C- SKU:
- PX7215C
- Availability:
- Ships Same Business Day
- Weight:
- 0.44 LBS
- ENGINE TYPE:
- 2-STROKE
- PISTON SIZE METRIC:
- +0.02 MM
- PRODUCT NAME:
- PISTON KIT
- PISTON DIAMETER METRIC:
- 53.97 MM
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 53.97 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- UNITS:
- EACH
$118.37 -
PROX Piston Kit 01.2217.D
PROX
$118.37PROX Piston Kit 01.2217.DManufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances, Pistons supplied in a kit...PX7215D- SKU:
- PX7215D
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- EACH
- BORE SIZE METRIC:
- 53.98 MM
- PISTON DIAMETER METRIC:
- 53.98 MM
- PISTON SIZE METRIC:
- STANDARD
$118.37Qty in Cart: 0Quantity:Price:$118.37Subtotal: -
PROX PRO-X Crank Seal Kit 42.2102
PROX
$9.95PROX PRO-X Crank Seal Kit 42.2102OEM quality, All seals necessary for complete crank rebuild included94280- SKU:
- 94280
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
$9.95 -
PROX PRO-X Crank Seal Kit 42.2218
PROX
$21.10PROX PRO-X Crank Seal Kit 42.2218OEM quality, All seals necessary for complete crank rebuild included94286- SKU:
- 94286
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
$21.10 -
PROX PRO-X Crank Seal Kit 42.2318
PROX
$15.24PROX PRO-X Crank Seal Kit 42.2318OEM quality, All seals necessary for complete crank rebuild included94287- SKU:
- 94287
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
$15.24 -
PROX PRO-X Crank Seal Kit 42.2319
PROX
$19.95PROX PRO-X Crank Seal Kit 42.2319OEM quality, All seals necessary for complete crank rebuild included94288- SKU:
- 94288
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
$19.95 -
PROX PRO-X Crank Seal Kit 42.2321
PROX
$19.95PROX PRO-X Crank Seal Kit 42.2321OEM quality, All seals necessary for complete crank rebuild included94289- SKU:
- 94289
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$19.95 -
PROX PRO-X Crank Seal Kit 42.2221
PROX
$19.95PROX PRO-X Crank Seal Kit 42.2221OEM quality, All seals necessary for complete crank rebuild included94290- SKU:
- 94290
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
$19.95 -
PROX PRO-X Crank Seal Kit 42.3316
PROX
$30.01PROX PRO-X Crank Seal Kit 42.3316OEM quality, All seals necessary for complete crank rebuild included94395- SKU:
- 94395
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
$30.01Qty in Cart: 0Quantity:Price:$30.01Subtotal: -
PROX PRO-X Crank Seal Kit 42.3219
PROX
$25.30PROX PRO-X Crank Seal Kit 42.3219OEM quality, All seals necessary for complete crank rebuild included94398- SKU:
- 94398
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
$25.30 -
PROX PRO-X Crank Seal Kit 42.4105
PROX
$9.95PROX PRO-X Crank Seal Kit 42.4105OEM quality, All seals necessary for complete crank rebuild included94481- SKU:
- 94481
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
$9.95 -
PROX PRO-X Crank Seal Kit 42.4208
PROX
$19.95PROX PRO-X Crank Seal Kit 42.4208OEM quality, All seals necessary for complete crank rebuild included94484- SKU:
- 94484
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
$19.95
