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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UFO Clutch Cover - Red - CRF250 AC02400
UFO
$31.95Constructed of abrasion/temperature-resistant PA6 plastic to give optimum protection against impacts, Perfect fit to the stock clutch cover (will not fit with aftermarket covers), Slim design to minimize interference with the rider’s boots, Easy...9401578- SKU:
- 9401578
- Weight:
- 0.35 LBS
$31.95Qty in Cart: 0Quantity:Price:$31.95Subtotal: -
UFO Clutch Cover - Red - CRF450 AC02401
UFO
$31.95Constructed of abrasion/temperature-resistant PA6 plastic to give optimum protection against impacts, Perfect fit to the stock clutch cover (will not fit with aftermarket covers), Slim design to minimize interference with the rider’s boots, Easy...9401579- SKU:
- 9401579
- Weight:
- 0.35 LBS
$31.95Qty in Cart: 0Quantity:Price:$31.95Subtotal: -
UFO Clutch Cover - YFZ/WRF450 AC02402
UFO
$31.95Constructed of abrasion/temperature-resistant PA6 plastic to give optimum protection against impacts, Perfect fit to the stock clutch cover (will not fit with aftermarket covers), Slim design to minimize interference with the rider’s boots, Easy...9401580- SKU:
- 9401580
- Weight:
- 0.45 LBS
$31.95Qty in Cart: 0Quantity:Price:$31.95Subtotal: -
UFO Clutch Cover - Green - KXF250 AC02404
UFO
$31.95UFO Clutch Cover Green KXF250 AC02404Constructed of abrasion/temperature-resistant PA6 plastic to give optimum protection against impacts, Perfect fit to the stock clutch cover (will not fit with aftermarket covers), Slim design to minimize interference...9401582- SKU:
- 9401582
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
$31.95Qty in Cart: 0Quantity:Price:$31.95Subtotal: -
UFO Clutch Cover - Green - KXF450 AC02405
UFO
$31.95Constructed of abrasion/temperature-resistant PA6 plastic to give optimum protection against impacts, Perfect fit to the stock clutch cover (will not fit with aftermarket covers), Slim design to minimize interference with the rider’s boots, Easy...9401583- SKU:
- 9401583
- Weight:
- 0.35 LBS
$31.95Qty in Cart: 0Quantity:Price:$31.95Subtotal: -
UFO Clutch Cover - Green - KXF450 AC02406
UFO
$31.95Constructed of abrasion/temperature-resistant PA6 plastic to give optimum protection against impacts, Perfect fit to the stock clutch cover (will not fit with aftermarket covers), Slim design to minimize interference with the rider’s boots, Easy...9401584- SKU:
- 9401584
- Weight:
- 0.35 LBS
$31.95Qty in Cart: 0Quantity:Price:$31.95Subtotal: -
UFO Clutch Cover - Yellow - RMZ250 AC02407
UFO
$31.95UFO Clutch Cover Yellow RMZ250 AC02407Constructed of abrasion/temperature-resistant PA6 plastic to give optimum protection against impacts, Perfect fit to the stock clutch cover (will not fit with aftermarket covers), Slim design to minimize interference...9401585- SKU:
- 9401585
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
$31.95Qty in Cart: 0Quantity:Price:$31.95Subtotal: -
UFO Clutch Cover - Yellow - RMZ450 AC02408
UFO
$31.95Constructed of abrasion/temperature-resistant PA6 plastic to give optimum protection against impacts, Perfect fit to the stock clutch cover (will not fit with aftermarket covers), Slim design to minimize interference with the rider’s boots, Easy...9401586- SKU:
- 9401586
- Weight:
- 4.00 LBS
$31.95Qty in Cart: 0Quantity:Price:$31.95Subtotal: -
UFO Clutch Cover - Orange - KTM AC02409
UFO
$30.95Constructed of abrasion/temperature-resistant PA6 plastic to give optimum protection against impacts, Perfect fit to the stock clutch cover (will not fit with aftermarket covers), Slim design to minimize interference with the rider’s boots, Easy...9401587- SKU:
- 9401587
- Weight:
- 4.00 LBS
$30.95Qty in Cart: 0Quantity:Price:$30.95Subtotal: -
UFO Clutch Cover - Orange - KTM AC02410
UFO
$31.95UFO Clutch Cover Orange KTM AC02410Constructed of abrasion/temperature-resistant PA6 plastic to give optimum protection against impacts, Perfect fit to the stock clutch cover (will not fit with aftermarket covers), Slim design to minimize interference...9401588- SKU:
- 9401588
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
$31.95Qty in Cart: 0Quantity:Price:$31.95Subtotal: -
On Sale
UFO Clutch Cover - Orange - KTM AC02411
UFO
MSRP: $31.95Now: $20.77Was: $31.95UFO Clutch Cover Orange KTM AC02411Constructed of abrasion/temperature-resistant PA6 plastic to give optimum protection against impacts, Perfect fit to the stock clutch cover (will not fit with aftermarket covers), Slim design to minimize interference...9401589- SKU:
- 9401589
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- MATERIAL:
- PLASTIC
- PRODUCT NAME:
- COVER
- COLOR/FINISH:
- ORANGE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH
MSRP: $31.95Now: $20.77Was: $31.95 -
On Sale
UFO Clutch Cover - Orange - KTM AC02412
UFO
MSRP: $31.95Now: $20.77Was: $31.95UFO Clutch Cover Orange KTM AC02412Constructed of abrasion/temperature-resistant PA6 plastic to give optimum protection against impacts, Perfect fit to the stock clutch cover (will not fit with aftermarket covers), Slim design to minimize interference...9401590- SKU:
- 9401590
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- STREET
- MATERIAL:
- PLASTIC
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- COLOR/FINISH:
- ORANGE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH
MSRP: $31.95Now: $20.77Was: $31.95 -
On Sale
VERTEX Piston Kit - Standard 22877B
VERTEX
MSRP: $112.95Now: $103.46Was: $114.95VERTEX Piston Kit Standard 22877BAll pistons are heat-treated with a T-5 hardening and tempering cycle, All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life9100941- SKU:
- 9100941
- Availability:
- Ships Same Business Day
- Weight:
- 0.42 LBS
- PISTON MATERIAL:
- CAST
- PRODUCT NAME:
- PISTON KIT
- ENGINE TYPE:
- 2-STROKE
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- CYLINDER DIAMETER METRIC:
- 48.00 MM
- PISTON DIAMETER METRIC:
- 47.95 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- DISPLACEMENT:
- 85 CC
- PISTON MATERIAL:
- ALUMINUM ALLOY
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- STYLE:
- CAST REPLICA
MSRP: $112.95Now: $103.46Was: $114.95 -
On Sale
VERTEX Piston Kit - Big Bore 22858200
VERTEX
MSRP: $97.95Now: $88.16Was: $97.95VERTEX Piston Kit Big Bore 22858200All pistons are heat-treated with a T-5 hardening and tempering cycle, All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life9100982- SKU:
- 9100982
- Availability:
- Ships Same Business Day
- Weight:
- 0.24 LBS
- BORE - OVERSIZE METRIC:
- +2.00 MM
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- CYLINDER DIAMETER METRIC:
- 47.00 MM
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE - OVERSIZE:
- +2,00 MM
- DISPLACEMENT:
- 71 CC
- PISTON DIAMETER METRIC:
- 46.95 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- CAST
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- STYLE:
- CAST BIG BORE
MSRP: $97.95Now: $88.16Was: $97.95Qty in Cart: 0Quantity:Price:MSRP: $97.95Now: $88.16Was: $97.95Subtotal: -
On Sale
VERTEX Piston Kit - Standard 22991A
VERTEX
MSRP: $139.95Now: $128.66Was: $142.95VERTEX Piston Kit Standard 22991AAll pistons are heat-treated with a T-5 hardening and tempering cycle, All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life9100984- SKU:
- 9100984
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- CAST
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- DISPLACEMENT:
- 105 CC
- PISTON DIAMETER METRIC:
- 51.95 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- CYLINDER DIAMETER METRIC:
- 52.00 MM
- STYLE:
- CAST REPLICA
MSRP: $139.95Now: $128.66Was: $142.95 -
On Sale
VERTEX Piston Kit 22532B
VERTEX
MSRP: $161.95Now: $148.46Was: $164.95VERTEX Piston Kit 22532BAll pistons are heat-treated with a T-5 hardening and tempering cycle, All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life9100987- SKU:
- 9100987
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- PISTON DIAMETER METRIC:
- 54.20 MM
- PRODUCT NAME:
- PISTON KIT
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- CYLINDER DIAMETER METRIC:
- 54.25 MM
- PISTON MATERIAL:
- CAST
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- DISPLACEMENT:
- 125 CC
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- STYLE:
- CAST REPLICA
MSRP: $161.95Now: $148.46Was: $164.95 -
On Sale
VERTEX Piston Kit - Standard 23383A
VERTEX
MSRP: $177.95Now: $163.76Was: $181.95VERTEX Piston Kit Standard 23383AAll pistons are heat-treated with a T-5 hardening and tempering cycle, All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life9100990- SKU:
- 9100990
- Availability:
- Ships Same Business Day
- Weight:
- 0.44 LBS
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- STYLE:
- CAST REPLICA
- PISTON DIAMETER METRIC:
- 55.95 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- CYLINDER DIAMETER METRIC:
- 56.00 MM
- DISPLACEMENT:
- 144 CC
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- CAST
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
MSRP: $177.95Now: $163.76Was: $181.95 -
WISECO Piston Kit - Standard - KX 250 F 40019M07700
WISECO
$224.95WISECO Piston Kit Standard KX 250 F 40019M07700Pistons come without gasket kit9102895- SKU:
- 9102895
- Availability:
- Ships Same Business Day
- Weight:
- 0.54 LBS
- BORE - OVERSIZE:
- STANDARD
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 77.00 MM
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- STROKE LENGTH METRIC:
- 53.60 MM
- UNITS:
- EACH
- DISPLACEMENT:
- 250 CC
$224.95 -
WISECO Piston - Yamaha - +1.00 mm 234M07100
WISECO
$199.95WISECO Piston Yamaha +1.00 mm 234M07100Forged from high-silicon alloy for maximum strength and dependability, Wiseco offers a complete range of popular piston models and years for both trail and racing applications, All Wiseco pistons are priced with...234M07100- SKU:
- 234M07100
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- DISPLACEMENT:
- 246 CC
- MODEL:
- FORGED SERIES
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- BORE - OVERSIZE:
- +1,00 MM
- PRODUCT NAME:
- PISTON KIT
- BORE SIZE METRIC:
- 71.00 MM
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- STROKE LENGTH METRIC:
- 64.00 MM
- BORE - OVERSIZE METRIC:
- +1.00 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON DIAMETER METRIC:
- 70.95 MM
- RIDING STYLE:
- OFF-ROAD
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
$199.95 -
WISECO Piston Kit 40056M08800
WISECO
$244.95WISECO Piston Kit 40056M08800Pistons come without gasket kit9102897- SKU:
- 9102897
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- STROKE LENGTH METRIC:
- 57.50 MM
- BORE SIZE METRIC:
- 88.00 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 12.3:1
- DISPLACEMENT:
- 350 CC
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$244.95Qty in Cart: 0Quantity:Price:$244.95Subtotal:
