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
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- Quantity
- Price
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BOYESEN Ignition Cover - Gold - CR125 SC-01AM
BOYESEN
$87.95BOYESEN Ignition Cover Gold CR125 SC-01AMLook like a professional with the Factory Ignition Cover, Seals properly, guarding inside of engine from dirt and water and outlasts stock covers, Boyesen Factory Covers are cast from the highest grade of aluminum...9400209- SKU:
- 9400209
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- COLOR/FINISH:
- POWDER-COATED
- MODEL:
- FACTORY RACING
- PRODUCT NAME:
- COVER
- TYPE:
- IGNITION
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- MAGNESIUM
- MATERIAL:
- ALUMINUM
$87.95 -
BOYESEN Replacement Gasket SCG-41A
BOYESEN
$5.95BOYESEN Replacement Gasket SCG-41ALook like a professional with the Factory Ignition Cover, Seals properly, guarding inside of engine from dirt and water and outlasts stock covers, Boyesen Factory Covers are cast from the highest grade of aluminum and...9343129- SKU:
- 9343129
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
$5.95Qty in Cart: 0Quantity:Price:$5.95Subtotal: -
BOYESEN Replacement Gasket - KTM CCG-44A
BOYESEN
$7.00BOYESEN Replacement Gasket KTM CCG-44ASet your ride apart from the rest with the ultimate look in race performance, Lightweight factory clutch covers provide years of outstanding protection; guaranteed not to warp, Individually surfaced for a perfect,...9343125- SKU:
- 9343125
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- MATERIAL:
- NITRILE RUBBER
- MODEL:
- FACTORY RACING
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
$7.00 -
On Sale
HOT RODS Crankshaft Assembly 4014
HOT RODS
MSRP: $247.95Now: $227.66Was: $252.95HOT RODS Crankshaft Assembly 4014Sold complete with the original proven Hot Rods connecting rods, top-end bearings and crankshaft webs, Factory assembled and trued to OEM specifications; meet or surpass OEM in performance and durability, Complete and...H117- SKU:
- H117
- Availability:
- Ships Same Business Day
- Weight:
- 4.10 LBS
- MATERIAL:
- 4140 STEEL
- UNITS:
- ASSEMBLY
- COLOR/FINISH:
- STEEL
- DISPLACEMENT:
- 65 CC
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 41.60 MM
- FEATURES:
- STANDARD CRANKSHAFT
- MODEL:
- 2-CYCLE
- TYPE:
- OEM STROKE
MSRP: $247.95Now: $227.66Was: $252.95 -
On Sale
HOT RODS Water Pump Repair Kit - Honda WPK0006
HOT RODS
MSRP: $27.95Now: $26.06Was: $28.95HOT RODS Water Pump Repair Kit Honda WPK0006Kits include water pump cover gasket, water pump shaft bearing(s) and seal(s) to repair a leaking pump or failed bearing, Precision micro bearings provide OEM quality and durability, High-pressure/temperature...9342918- SKU:
- 9342918
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP REPAIR
- UNITS:
- KIT
MSRP: $27.95Now: $26.06Was: $28.95 -
On Sale
HOT RODS Water Pump Repair Kit - Honda WPK0007
HOT RODS
MSRP: $50.95Now: $46.76Was: $51.95HOT RODS Water Pump Repair Kit Honda WPK0007Kits include water pump cover gasket, water pump shaft bearing(s) and seal(s) to repair a leaking pump or failed bearing, Precision micro bearings provide OEM quality and durability, High-pressure/temperature...9342919- SKU:
- 9342919
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP REPAIR
- UNITS:
- KIT
MSRP: $50.95Now: $46.76Was: $51.95 -
On Sale
HOT RODS Water Pump Repair Kit - Honda WPK0008
HOT RODS
MSRP: $43.95Now: $40.46Was: $44.95HOT RODS Water Pump Repair Kit Honda WPK0008Kits include water pump cover gasket, water pump shaft bearing(s) and seal(s) to repair a leaking pump or failed bearing, Precision micro bearings provide OEM quality and durability, High-pressure/temperature...9342920- SKU:
- 9342920
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- TYPE:
- WATER PUMP REPAIR
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
MSRP: $43.95Now: $40.46Was: $44.95 -
On Sale
HOT RODS Crankshaft Assembly 4032
HOT RODS
MSRP: $387.95Now: $356.36Was: $395.95HOT RODS Crankshaft Assembly 4032Sold complete with the original proven Hot Rods connecting rods, top-end bearings and crankshaft webs, Factory assembled and trued to OEM specifications; meet or surpass OEM in performance and durability, Complete and...H121- SKU:
- H121
- Availability:
- Ships Same Business Day
- Weight:
- 6.56 LBS
- COLOR/FINISH:
- STEEL
- FEATURES:
- STANDARD CRANKSHAFT
- STROKE LENGTH METRIC:
- 54.60 MM
- TYPE:
- OEM STROKE
- MATERIAL:
- 4140 STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- ASSEMBLY
- MODEL:
- 2-CYCLE
- DISPLACEMENT:
- 125 CC
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
MSRP: $387.95Now: $356.36Was: $395.95 -
On Sale
HOT RODS Crank Bearings K085
HOT RODS
MSRP: $172.95Now: $158.36Was: $175.95HOT RODS Crank Bearings K085Precision, high-quality main bearing and seal kits complement installation of Hot Rods crankshaft assemblies9240373- SKU:
- 9240373
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- APPLICATION:
- MAIN CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- BEARING
- TYPE:
- BALL
MSRP: $172.95Now: $158.36Was: $175.95 -
On Sale
HOT RODS Crankshaft 4093
HOT RODS
MSRP: $409.95Now: $376.16Was: $417.95HOT RODS Crankshaft 4093Sold complete with the original proven Hot Rods connecting rods, top-end bearings and crankshaft webs, Factory assembled and trued to OEM specifications; meet or surpass OEM in performance and durability, Complete and ready for...9210213- SKU:
- 9210213
- Availability:
- Ships Same Business Day
- Weight:
- 9.94 LBS
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- MODEL:
- 4-CYCLE
- DISPLACEMENT:
- 450 CC
- FEATURES:
- STANDARD CRANKSHAFT
- TYPE:
- OEM STROKE
- COLOR/FINISH:
- STEEL
- MATERIAL:
- 4140 STEEL
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 62.10 MM
- UNITS:
- ASSEMBLY
MSRP: $409.95Now: $376.16Was: $417.95 -
On Sale
HOT RODS Crankshaft 4095
HOT RODS
MSRP: $323.95Now: $296.96Was: $329.95HOT RODS Crankshaft 4095Sold complete with the original proven Hot Rods connecting rods, top-end bearings and crankshaft webs, Factory assembled and trued to OEM specifications; meet or surpass OEM in performance and durability, Complete and ready for...9210215- SKU:
- 9210215
- Availability:
- Ships Same Business Day
- Weight:
- 7.15 LBS
- COLOR/FINISH:
- STEEL
- MATERIAL:
- 4140 STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- ASSEMBLY
- FEATURES:
- HEAVY DUTY CRANKSHAFT
- TYPE:
- OEM STROKE
- DISPLACEMENT:
- 250 CC
- MODEL:
- 4-CYCLE
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- STROKE LENGTH METRIC:
- 52.20 MM
MSRP: $323.95Now: $296.96Was: $329.95 -
On Sale
HOT RODS Crankshaft Kit CBK0119
HOT RODS
MSRP: $484.95Now: $445.46Was: $494.95HOT RODS Crankshaft Kit CBK0119Assembly sold complete with Hot Rods connecting rod, Factory assembled and true to OEM specifications, Hot Rods cranks will meet or surpass the OEM in performance, Ready for installation, Crankshaft is completely...9210356- SKU:
- 9210356
- Availability:
- Ships Same Business Day
- Weight:
- 9.00 LBS
- PRODUCT NAME:
- CRANKSHAFT KIT
- TYPE:
- OEM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
MSRP: $484.95Now: $445.46Was: $494.95Qty in Cart: 0Quantity:Price:MSRP: $484.95Now: $445.46Was: $494.95Subtotal: -
On Sale
HOT RODS Crankshaft Kit CBK0120
HOT RODS
MSRP: $808.95Now: $742.46Was: $824.95HOT RODS Crankshaft Kit CBK0120Assembly sold complete with Hot Rods connecting rod, Factory assembled and true to OEM specifications, Hot Rods cranks will meet or surpass the OEM in performance, Ready for installation, Crankshaft is completely...9210357- SKU:
- 9210357
- Availability:
- Ships Same Business Day
- Weight:
- 13.65 LBS
- PRODUCT NAME:
- CRANKSHAFT KIT
- TYPE:
- OEM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
MSRP: $808.95Now: $742.46Was: $824.95 -
On Sale
HOT RODS Crankshaft Kit CBK0124
HOT RODS
MSRP: $625.95Now: $574.16Was: $637.95HOT RODS Crankshaft Kit CBK0124Assembly sold complete with Hot Rods connecting rod, Factory assembled and true to OEM specifications, Hot Rods cranks will meet or surpass the OEM in performance, Ready for installation, Crankshaft is completely...9210358- SKU:
- 9210358
- Availability:
- Ships Same Business Day
- Weight:
- 13.08 LBS
- TYPE:
- OEM
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- CRANKSHAFT KIT
- UNITS:
- KIT
MSRP: $625.95Now: $574.16Was: $637.95 -
On Sale
HOT RODS Crankshaft 4068
HOT RODS
MSRP: $199.95Now: $179.96Was: $199.95HOT RODS Crankshaft 4068Sold complete with the original proven Hot Rods connecting rods, top-end bearings and crankshaft webs, Factory assembled and trued to OEM specifications; meet or surpass OEM in performance and durability, Complete and ready for...9210076- SKU:
- 9210076
- Availability:
- Ships Same Business Day
- Weight:
- 4.78 LBS
- COLOR/FINISH:
- STEEL
- DISPLACEMENT:
- 85 CC
- MATERIAL:
- 4140 STEEL
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 48.00 MM
- UNITS:
- ASSEMBLY
- MODEL:
- 2-CYCLE
- FEATURES:
- STANDARD CRANKSHAFT
- TYPE:
- OEM STROKE
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
MSRP: $199.95Now: $179.96Was: $199.95 -
On Sale
HOT RODS Crankshaft - Stroker 4166
HOT RODS
MSRP: $257.95Now: $236.66Was: $262.95HOT RODS Crankshaft Stroker 4166Hot Rods has developed six long-stroke applications for ATVs, Special pistons for TRX400EX, KFX/LTZ 400, Banshee, Warrior and Raptor make these installations simple by avoiding machine work and parts typically required for...9210077- SKU:
- 9210077
- Availability:
- Ships Same Business Day
- Weight:
- 4.60 LBS
- COLOR/FINISH:
- STEEL
- DISPLACEMENT:
- 88 CC TO 103.5 CC
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- ASSEMBLY
- MATERIAL:
- 4140 STEEL
- MODEL:
- 2-CYCLE
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- STROKE LENGTH:
- 47,80 MM
- STROKE LENGTH METRIC:
- 47.80 MM
- FEATURES:
- STANDARD CRANKSHAFT
- TYPE:
- STROKER
MSRP: $257.95Now: $236.66Was: $262.95Qty in Cart: 0Quantity:Price:MSRP: $257.95Now: $236.66Was: $262.95Subtotal: -
COMETIC Water Pump Install - Kawasaki C7029WP
COMETIC
$35.95COMETIC Water Pump Install Kawasaki C7029WPKits contain all components needed to properly replace water pump impeller or leaking water pump cover, Quality seals, O-rings, bearings, crush washers and AFM Cometic engine cover gaskets included for...9345424- SKU:
- 9345424
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- PRODUCT NAME:
- INSTALL KIT
$35.95 -
COMETIC Water Pump Install - Honda C7757WP
COMETIC
$43.95COMETIC Water Pump Install Honda C7757WPKits contain all components needed to properly replace water pump impeller or leaking water pump cover, Quality seals, O-rings, bearings, crush washers and AFM Cometic engine cover gaskets included for dependable,...9345441- SKU:
- 9345441
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- PRODUCT NAME:
- INSTALL KIT
- RIDING STYLE:
- OFF-ROAD
$43.95 -
COMETIC Clutch Cover Gasket - Kawasaki EC513018AFM
COMETIC
$13.95COMETIC Clutch Cover Gasket Kawasaki EC513018AFMGaskets and gasket sets used by professionals in high-performance machines and as OE replacements worldwide, Each Kit contains the proper number of gaskets for one application, Made in the U.S.A.9345456- SKU:
- 9345456
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- SET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
$13.95 -
COMETIC Top End Gasket Set - Yamaha C3105
COMETIC
$41.95COMETIC Top End Gasket Set Yamaha C3105Top end gasket kits include correct base, head gasket and cylinder O-rings as well as other top end specific O-rings or seals needed for R&R of top end, MLS head gaskets promote an even torque load across the gasket...9343427- SKU:
- 9343427
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- TOP END
- RIDING STYLE:
- OFF-ROAD
$41.95
