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 Top End Gasket Set - Honda 35.1402
PROX
$89.95PROX Top End Gasket Set Honda 35.1402PROX Top End Gasket Set - Honda9345677- SKU:
- 9345677
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET SET
- UNITS:
- SET
$89.95 -
PROX Top End Gasket Set - Honda 35.1409
PROX
$39.95PROX Top End Gasket Set Honda 35.1409PROX Top End Gasket Set - Honda9345681- SKU:
- 9345681
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- SET
$39.95 -
PROX Top End Gasket Set - Yamaha 35.2113
PROX
$21.39PROX Top End Gasket Set Yamaha 35.2113PROX Top End Gasket Set - Yamaha9345685- SKU:
- 9345685
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- UNITS:
- SET
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET SET
- TYPE:
- TOP END
$21.39 -
PROX Top End Gasket Set - Yamaha 35.2122
PROX
$24.95PROX Top End Gasket Set Yamaha 35.2122PROX Top End Gasket Set - Yamaha9345686- SKU:
- 9345686
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET SET
- TYPE:
- TOP END
- UNITS:
- SET
$24.95 -
PROX Top End Gasket Set - Yamaha 35.2201
PROX
$52.29PROX Top End Gasket Set Yamaha 35.2201PROX Top End Gasket Set - Yamaha9345687- SKU:
- 9345687
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET SET
- UNITS:
- SET
- RIDING STYLE:
- OFF-ROAD
$52.29 -
PROX Piston Kit 01.1218.A3
PROX
$118.37PROX Piston Kit 01.1218.A3Manufactured 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...PX4260C- SKU:
- PX4260C
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- PISTON DIAMETER METRIC:
- 53.96 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- UNITS:
- EACH
- BORE SIZE METRIC:
- 53.96 MM
- PRODUCT NAME:
- PISTON KIT
- PISTON SIZE METRIC:
- STANDARD SIZE A
- RIDING STYLE:
- OFF-ROAD
$118.37 -
PROX Piston Kit 01.2215.B
PROX
$118.37PROX Piston Kit 01.2215.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...PX7214B- SKU:
- PX7214B
- Availability:
- Ships Same Business Day
- Weight:
- 0.44 LBS
- BORE SIZE METRIC:
- 53.95 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON SIZE METRIC:
- +0.01 MM
- PISTON DIAMETER METRIC:
- 53.95 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- PRODUCT NAME:
- PISTON KIT
$118.37Qty in Cart: 0Quantity:Price:$118.37Subtotal: -
PROX Piston Kit 01.4223.A
PROX
$106.20PROX Piston Kit 01.4223.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...9100024- SKU:
- 9100024
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PISTON DIAMETER METRIC:
- 53.95 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- EACH
- PISTON SIZE METRIC:
- STANDARD SIZE A
- BORE SIZE METRIC:
- 53.95 MM
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
$106.20 -
PROX Piston Kit 01.1414.A
PROX
$212.46PROX Piston Kit 01.1414.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...9100607- SKU:
- 9100607
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- BORE SIZE METRIC:
- 95.96 MM
- PISTON DIAMETER METRIC:
- 95.96 MM
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- EACH
- PISTON SIZE METRIC:
- STANDARD SIZE A
- RIDING STYLE:
- OFF-ROAD
$212.46 -
PROX Piston Kit 01.1338.B
PROX
$199.02PROX Piston Kit 01.1338.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...9101127- SKU:
- 9101127
- Availability:
- Ships Same Business Day
- Weight:
- 0.49 LBS
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- PISTON DIAMETER METRIC:
- 77.98 MM
- BORE SIZE METRIC:
- 77.98 MM
- PISTON SIZE METRIC:
- STANDARD
- PRODUCT NAME:
- PISTON KIT
$199.02 -
PROX Connecting Rod 03.6520
PROX
$205.65PROX Connecting Rod 03.6520Comes complete with crankpin, big-end bearing, small-end bearing, and washers, Easy to install9230138- SKU:
- 9230138
- Availability:
- Ships Same Business Day
- Weight:
- 1.92 LBS
- MATERIAL:
- FORGED STEEL
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- CONNECTING ROD KIT
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- ATV
- UNITS:
- EACH
$205.65 -
PROX Connecting Rod 03.4285
PROX
$129.43PROX Connecting Rod 03.4285Comes complete with crankpin, big-end bearing, small-end bearing, and washers, Easy to install9230161- SKU:
- 9230161
- Availability:
- Ships Same Business Day
- Weight:
- 0.76 LBS
- MATERIAL:
- FORGED STEEL
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$129.43 -
PROX Crankshaft 10.4124
PROX
$221.00PROX Crankshaft 10.4124High-quality forged connecting rod kit, Meet or exceed OEM crankshafts in performance and durability9210789- SKU:
- 9210789
- Availability:
- Ships Same Business Day
- Weight:
- 5.10 LBS
$221.00Qty in Cart: 0Quantity:Price:$221.00Subtotal: -
PROX Crankshaft 10.6113
PROX
$289.97PROX Crankshaft 10.6113High-quality forged connecting rod kit, Meet or exceed OEM crankshafts in performance and durability9210790- SKU:
- 9210790
- Availability:
- Ships Same Business Day
- Weight:
- 5.40 LBS
$289.97Qty in Cart: 0Quantity:Price:$289.97Subtotal: -
PROX Exhaust Valve 28.1356-1
PROX
$29.95PROX Exhaust Valve 28.1356-1Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only9260673- SKU:
- 9260673
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- VALVE
$29.95 -
PROX Intake Valve 28.1356-2
PROX
$20.79PROX Intake Valve 28.1356-2Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only9260674- SKU:
- 9260674
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
- APPLICATION:
- INTAKE
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- VALVE
- UNITS:
- EACH
$20.79 -
PROX Connecting Rod 03.3402
PROX
$183.70PROX Connecting Rod 03.3402Comes complete with crankpin, big-end bearing, small-end bearing, and washers, Easy to install9230164- SKU:
- 9230164
- Availability:
- Ships Same Business Day
- Weight:
- 1.68 LBS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- EACH
- ENGINE TYPE:
- 4-STROKE
- MATERIAL:
- FORGED STEEL
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
$183.70 -
PROX Connecting Rod 03.6323
PROX
$132.24PROX Connecting Rod 03.6323Comes complete with crankpin, big-end bearing, small-end bearing, and washers, Easy to install9230173- SKU:
- 9230173
- Availability:
- Ships Same Business Day
- Weight:
- 0.99 LBS
- ENGINE TYPE:
- 2-STROKE
- MATERIAL:
- FORGED STEEL
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$132.24 -
PROX Connecting Rod 03.3323
PROX
$132.24PROX Connecting Rod 03.3323Comes complete with crankpin, big-end bearing, small-end bearing, and washers, Easy to install9230185- SKU:
- 9230185
- Availability:
- Ships Same Business Day
- Weight:
- 1.02 LBS
- UNITS:
- EACH
- ENGINE TYPE:
- 2-STROKE
- MATERIAL:
- FORGED STEEL
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- OFF-ROAD
$132.24 -
PROX Crank Bearing and Seal Kit 23.CBS13092
PROX
$65.95PROX Crank Bearing and Seal Kit 23.CBS13092Made to exact OEM specifications for maximum performance and durability, Includes all necessary bearings/seals for a component's replacement, For use with OEM or Pro X crankshafts9240302- SKU:
- 9240302
- Availability:
- Ships Same Business Day
- Weight:
- 1.60 LBS
- PRODUCT NAME:
- BEARING AND SEAL KIT
- STYLE:
- 2-STROKE
- APPLICATION:
- CRANKSHAFT
- TYPE:
- BALL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$65.95
