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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On Sale
VERTEX Piston Ring 53010005800
VERTEX
MSRP: $24.95Now: $22.46Was: $24.95VERTEX Piston Ring 53010005800Replacement piston rings, Nitride coated or chrome plated, increasing wear resistance and extending durability, The latest generation for both two-stroke and four-stroke engines; four-stroke piston rings are sold in sets and...9120173- SKU:
- 9120173
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- PRODUCT NAME:
- PISTON RING
- PISTON DIAMETER METRIC:
- 57.95 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
MSRP: $24.95Now: $22.46Was: $24.95 -
On Sale
VERTEX Piston Kit 23296
VERTEX
MSRP: $219.95Now: $197.96Was: $219.95All 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 life, Cast piston kits are gravity cast aluminum alloy (not...9102072- SKU:
- 9102072
- Weight:
- 11.00 LBS
MSRP: $219.95Now: $197.96Was: $219.95Qty in Cart: 0Quantity:Price:MSRP: $219.95Now: $197.96Was: $219.95Subtotal: -
On Sale
VERTEX Piston Kit 23641A
VERTEX
MSRP: $247.95Now: $227.66Was: $252.95VERTEX Piston Kit 23641AAll 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 life, Cast piston kits are gravity...9102073- SKU:
- 9102073
- Availability:
- Ships Same Business Day
- Weight:
- 0.69 LBS
- DISPLACEMENT:
- 350 CC
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- COMPRESSION RATIO IMPERIAL:
- 12.8:1
- CYLINDER DIAMETER METRIC:
- 88.00 MM
- PISTON DIAMETER METRIC:
- 87.96 MM
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- STYLE:
- FORGED HIGH COMPRESSION
- UNITS:
- KIT
MSRP: $247.95Now: $227.66Was: $252.95 -
WISECO Piston Kit with Gaskets PK1278
WISECO
$179.95WISECO Piston Kit with Gaskets PK1278Most Wiseco 2-cycle pistons are forged from high-silicone bar stock, Greater strength and lower expansion at high temperatures, Complete piston kits include High-Performance forged pistons, rings, wrist pins, circlips...9030230- SKU:
- 9030230
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- BORE - OVERSIZE:
- +1,00 MM
- BORE - OVERSIZE METRIC:
- +1.00 MM
- PISTON DIAMETER METRIC:
- 48.47 MM
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
- DISPLACEMENT:
- 79.7 CC
- MODEL:
- FORGED SERIES
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- TOP END
- BORE SIZE METRIC:
- 48.50 MM
- COMPRESSION RATIO IMPERIAL:
- 9.7:1
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- STROKE LENGTH METRIC:
- 45.00 MM
$179.95 -
WISECO Piston Kit with Gaskets PK1116
WISECO
$204.95WISECO Piston Kit with Gaskets PK1116Most Wiseco 2-cycle pistons are forged from high-silicone bar stock, Greater strength and lower expansion at high temperatures, Complete piston kits include High-Performance forged pistons, rings, wrist pins, circlips...9030231- SKU:
- 9030231
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- BORE SIZE METRIC:
- 65.50 MM
- RIDING STYLE:
- OFF-ROAD
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- DISPLACEMENT:
- 192 CC
- PISTON DIAMETER METRIC:
- 65.45 MM
- MODEL:
- FORGED SERIES
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- TOP END
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- 2618 ALUMINUM ALLOY
- STROKE LENGTH METRIC:
- 57.80 MM
$204.95Qty in Cart: 0Quantity:Price:$204.95Subtotal: -
WISECO Engine Kit - RM250 - 2003-2004 PWR165A-100
WISECO
$664.95WISECO Engine Kit RM250 2003-2004 PWR165A-100Includes all top and bottom-end components for a complete engine rebuild, Crankshaft and rod assembly designed and inspected to assure durability, Kit includes main bearings, seals, gaskets, an hour meter and...9031544- SKU:
- 9031544
- Availability:
- Ships Same Business Day
- Weight:
- 13.65 LBS
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- DISPLACEMENT:
- 250 CC
- ENGINE TYPE:
- 2-STROKE
- BORE SIZE METRIC:
- 66.40 MM
- OVERBORE METRIC:
- STANDARD
- UNITS:
- KIT
- FEATURES:
- PROLITE® PISTON
- MODEL:
- GARAGE BUDDY
- RIDING STYLE:
- OFF-ROAD
$664.95Qty in Cart: 0Quantity:Price:$664.95Subtotal: -
WISECO Engine Kit - RM250 - 2005-2010 PWR165B-100
WISECO
$664.95WISECO Engine Kit RM250 2005-2010 PWR165B-100Includes all top and bottom-end components for a complete engine rebuild, Crankshaft and rod assembly designed and inspected to assure durability, Kit includes main bearings, seals, gaskets, an hour meter and...9031545- SKU:
- 9031545
- Availability:
- Ships Same Business Day
- Weight:
- 13.95 LBS
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- GARAGE BUDDY
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 66.40 MM
- UNITS:
- KIT
- DISPLACEMENT:
- 250 CC
- FEATURES:
- PROLITE® PISTON
- OVERBORE METRIC:
- STANDARD
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
$664.95 -
WISECO Piston Kit with Gaskets PK1564
WISECO
$261.32WISECO Piston Kit with Gaskets PK1564Most Wiseco 2-cycle pistons are forged from high-silicone bar stock, Greater strength and lower expansion at high temperatures, Complete piston kits include High-Performance forged pistons, rings, wrist pins, circlips...9030717- SKU:
- 9030717
- Availability:
- Ships Same Business Day
- Weight:
- 1.45 LBS
- SKIRT COATING:
- NON-COATED
- STROKE LENGTH METRIC:
- 68.00 MM
- BORE - OVERSIZE METRIC:
- +0.50 MM
- DISPLACEMENT:
- 246.8 CC
- PISTON DIAMETER METRIC:
- 68.46 MM
- PRODUCT NAME:
- REBUILD KIT
- BORE - OVERSIZE:
- +0,50 MM
- BORE SIZE METRIC:
- 68.50 MM
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- PRO-LITE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
$261.32Qty in Cart: 0Quantity:Price:$261.32Subtotal: -
WISECO Piston 4753M09600
WISECO
$229.95WISECO Piston 4753M09600Forged 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 rings and circlips4753M09600- SKU:
- 4753M09600
- Availability:
- Ships Same Business Day
- Weight:
- 0.42 LBS
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 62.10 MM
- COMPRESSION RATIO IMPERIAL:
- 11.5:1
- DISPLACEMENT:
- 449 CC
- PISTON DIAMETER METRIC:
- 95.94 MM
- SKIRT COATING:
- ARMORGLIDE®
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 96.00 MM
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- FORGED SERIES
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- KIT
$229.95 -
WISECO Piston 4755M09600
WISECO
$269.95WISECO Piston 4755M09600Forged 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 rings and circlips4755M09600- SKU:
- 4755M09600
- Availability:
- Ships Same Business Day
- Weight:
- 0.92 LBS
- STROKE LENGTH METRIC:
- 62.10 MM
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 96.00 MM
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- KIT
- DISPLACEMENT:
- 449 CC
- MODEL:
- FORGED SERIES
- PISTON DIAMETER METRIC:
- 95.94 MM
- SKIRT COATING:
- ARMORGLIDE®
$269.95Qty in Cart: 0Quantity:Price:$269.95Subtotal: -
WOSSNER Piston Kit 8608DA
WOSSNER
$207.95WOSSNER Piston Kit 8608DA2 Stoke Pistons:include piston, rings, pin and clips, Piston made with high quality, permanent skirt coating to reduce friction and piston rock for quiet and improved performance, 4032 T6 Forged Aluminum Alloy, German Engineered...9104944- SKU:
- 9104944
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 96.00 MM
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 12.0:1
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 95.96 MM
- MODEL:
- PREMIUM SERIES
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$207.95 -
BOYESEN Impeller Pump YZ250F WPI-37
BOYESEN
$79.95Designed to increase water flow and reduce hydraulic friction for a cooler, more constant temperature, Less horsepower loss during the late stages of a race, Extend engine life, Impellers are designed to minimize cavitationWPI37- SKU:
- WPI37
- Weight:
- 0.14 LBS
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- IMPELLER
- UNITS:
- EACH
- TYPE:
- WATER PUMP
- MODEL:
- SUPERCOOLER
- RIDING STYLE:
- OFF-ROAD
$79.95 -
BOYESEN Impeller Pump YZ/WR WPI-32A
BOYESEN
$79.95Designed to increase water flow and reduce hydraulic friction for a cooler, more constant temperature, Less horsepower loss during the late stages of a race, Extend engine life, Impellers are designed to minimize cavitationWPI32A- SKU:
- WPI32A
- Weight:
- 0.35 LBS
- PRODUCT NAME:
- IMPELLER
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- ALUMINUM
- MODEL:
- SUPERCOOLER
- TYPE:
- WATER PUMP
- UNITS:
- EACH
$79.95 -
BOYESEN Impeller Pump YZ125 WPI-31
BOYESEN
$79.95Designed to increase water flow and reduce hydraulic friction for a cooler, more constant temperature, Less horsepower loss during the late stages of a race, Extend engine life, Impellers are designed to minimize cavitationWPI31- SKU:
- WPI31
- Weight:
- 0.40 LBS
- MODEL:
- SUPERCOOLER
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP
- PRODUCT NAME:
- IMPELLER
- MATERIAL:
- ALUMINUM
- UNITS:
- EACH
$79.95 -
BOYESEN Clutch Cover - Gold CC-17AM
BOYESEN
$95.95BOYESEN Clutch Cover Gold CC-17AMSet your ride apart from the rest with the ultimate look in race performance, Lightweight factory clutch covers provide years of outstanding protection, Individually surfaced for a perfect, leak-free fit, Super-tough,...9401117- SKU:
- 9401117
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- UNITS:
- EACH
- COLOR/FINISH:
- MAGNESIUM
- COLOR/FINISH:
- POWDER-COATED
- MODEL:
- FACTORY RACING
- TYPE:
- CLUTCH
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- OFF-ROAD
$95.95 -
BOYESEN Clutch Cover - Black CC-17AB
BOYESEN
$95.95BOYESEN Clutch Cover Black CC-17ABSet your ride apart from the rest with the ultimate look in race performance, Lightweight factory clutch covers provide years of outstanding protection, Individually surfaced for a perfect, leak-free fit, Super-tough,...9401116- SKU:
- 9401116
- Availability:
- Ships Same Business Day
- Weight:
- 0.74 LBS
- TYPE:
- CLUTCH
- COLOR/FINISH:
- BLACK
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- COLOR/FINISH:
- POWDER-COATED
- MODEL:
- FACTORY RACING
$95.95 -
BOYESEN Clutch Cover - Gold CC-10M
BOYESEN
$179.95BOYESEN Clutch Cover Gold CC-10MSet your ride apart from the rest with the ultimate look in race performance, Lightweight factory clutch covers provide years of outstanding protection, Individually surfaced for a perfect, leak-free fit, Super-tough,...9401114- SKU:
- 9401114
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- COLOR/FINISH:
- MAGNESIUM
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- COLOR/FINISH:
- POWDER-COATED
- MODEL:
- FACTORY RACING
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH
$179.95 -
BOYESEN Clutch Cover - Black CC-10B
BOYESEN
$179.95BOYESEN Clutch Cover Black CC-10BSet your ride apart from the rest with the ultimate look in race performance, Lightweight factory clutch covers provide years of outstanding protection, Individually surfaced for a perfect, leak-free fit, Super-tough,...9401113- SKU:
- 9401113
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- POWDER-COATED
- MODEL:
- FACTORY RACING
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH
$179.95 -
On Sale
BOYESEN Clutch Cover - Gold CC-06AM
BOYESEN
MSRP: $95.95Now: $62.37Was: $95.95BOYESEN Clutch Cover Gold CC-06AMSet your ride apart from the rest with the ultimate look in race performance, Lightweight factory clutch covers provide years of outstanding protection, Individually surfaced for a perfect, leak-free fit, Super-tough,...9401111- SKU:
- 9401111
- Availability:
- Ships Same Business Day
- Weight:
- 0.81 LBS
MSRP: $95.95Now: $62.37Was: $95.95 -
BOYESEN Clutch Cover - Black CC-06AB
BOYESEN
$95.95BOYESEN Clutch Cover Black CC-06ABSet your ride apart from the rest with the ultimate look in race performance, Lightweight factory clutch covers provide years of outstanding protection, Individually surfaced for a perfect, leak-free fit, Super-tough,...9401110- SKU:
- 9401110
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- COLOR/FINISH:
- POWDER-COATED
- MODEL:
- FACTORY RACING
- TYPE:
- CLUTCH
- COLOR/FINISH:
- BLACK
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$95.95
