Dirt Bike Engine
Discover a full range of dirt bike engine components for rebuilding or upgrading your performance. From crankshafts to cylinder heads and piston kits, these precision-engineered components ensure reliable performance. For additional upgrades, check out our full selection of off-road dirt bike parts.
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- Qty in Cart
- Quantity
- Price
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HOT RODS Crankshaft Assembly 4053
HOT RODS
$229.95HOT RODS Crankshaft Assembly 4053Sold 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...09210021- SKU:
- 09210021
- Availability:
- Ships Same Business Day
- Weight:
- 6.22 LBS
- DISPLACEMENT:
- 125 CC
- FEATURES:
- STANDARD CRANKSHAFT
- TYPE:
- OEM STROKE
- MODEL:
- 2-CYCLE
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- MATERIAL:
- 4140 STEEL
- UNITS:
- ASSEMBLY
- COLOR/FINISH:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 54.60 MM
$229.95 -
HOT RODS Crankshaft Assembly 4055
HOT RODS
$282.95HOT RODS Crankshaft Assembly 4055Sold 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...09210023- SKU:
- 09210023
- Availability:
- Ships Same Business Day
- Weight:
- 6.36 LBS
- DISPLACEMENT:
- 125 CC
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- MODEL:
- 2-CYCLE
- COLOR/FINISH:
- STEEL
- FEATURES:
- STANDARD CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 54.60 MM
- TYPE:
- OEM STROKE
- MATERIAL:
- 4140 STEEL
- UNITS:
- ASSEMBLY
$282.95 -
HOT RODS Crankshaft Assembly - Stroker 4116
HOT RODS
$268.95HOT RODS Crankshaft Assembly Stroker 4116Hot 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...09210025- SKU:
- 09210025
- Availability:
- Ships Same Business Day
- Weight:
- 4.60 LBS
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- STROKE LENGTH:
- 47,80 MM
- DISPLACEMENT:
- 85 CC TO 100 CC
- UNITS:
- ASSEMBLY
- COLOR/FINISH:
- STEEL
- FEATURES:
- STANDARD CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- STROKER
- MATERIAL:
- 4140 STEEL
- MODEL:
- 2-CYCLE
- STROKE LENGTH METRIC:
- 47.80 MM
$268.95 -
HOT RODS Crankshaft 4061
HOT RODS
$834.95HOT RODS Crankshaft 4061Sold 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...09210037- SKU:
- 09210037
- Availability:
- Ships Same Business Day
- Weight:
- 21.89 LBS
- FEATURES:
- STANDARD CRANKSHAFT
- TYPE:
- OEM STROKE
- MATERIAL:
- 4140 STEEL
- RIDING STYLE:
- WATERCRAFT
- UNITS:
- ASSEMBLY
- DISPLACEMENT:
- 743 CC TO 781 CC
- MODEL:
- 2-CYCLE
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- COLOR/FINISH:
- STEEL
- STROKE LENGTH METRIC:
- 37.00 MM
$834.95 -
HOT RODS Crankshaft Kit CBK0053
HOT RODS
$392.95HOT RODS Crankshaft Kit CBK0053Assembly 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...09210301- SKU:
- 09210301
- Availability:
- Ships Same Business Day
- Weight:
- 6.70 LBS
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- CRANKSHAFT KIT
- TYPE:
- OEM
$392.95 -
HOT RODS Crankshaft Kit CBK0002
HOT RODS
$368.95HOT RODS Crankshaft Kit CBK0002Assembly 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...09210261- SKU:
- 09210261
- Availability:
- Ships Same Business Day
- Weight:
- 6.65 LBS
- PRODUCT NAME:
- CRANKSHAFT KIT
- TYPE:
- OEM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$368.95 -
COMETIC Top End Gasket Set - Suzuki C7778
COMETIC
$40.95COMETIC Top End Gasket Set Suzuki C7778Top 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...C7778- SKU:
- C7778
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
$40.95 -
COMETIC Top End Gasket Set - YZ85 C7851
COMETIC
$31.95COMETIC Top End Gasket Set YZ85 C7851Top 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...C7851- SKU:
- C7851
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
$31.95Qty in Cart: 0Quantity:Price:$31.95Subtotal: -
COMETIC Shift Shaft Seal OS236
COMETIC
$5.95COMETIC Shift Shaft Seal OS236High-quality seals allow for proper sealing of common leaks, Made of quality materials developed for maximum performance tolerances and longevity, Recommended to replace the countershaft sprocket seal when...09350875- SKU:
- 09350875
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- APPLICATION:
- SHIFTER SHAFT
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SEAL
- UNITS:
- EACH
$5.95Qty in Cart: 0Quantity:Price:$5.95Subtotal: -
COMETIC Water Pump Install - Yamaha C3057WP
COMETIC
$42.95COMETIC Water Pump Install Yamaha C3057WPKits 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,...09345381- SKU:
- 09345381
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- INSTALL KIT
$42.95Qty in Cart: 0Quantity:Price:$42.95Subtotal: -
COMETIC Top End Gaskets - KTM C3606
COMETIC
$74.95COMETIC Top End Gaskets KTM C3606Gaskets 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.09345414- SKU:
- 09345414
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- SET
$74.95 -
COMETIC Lower End Gaskets - KTM C3606BE
COMETIC
$115.95COMETIC Lower End Gaskets KTM C3606BEGaskets 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.09345415- SKU:
- 09345415
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- BOTTOM END
- UNITS:
- SET
$115.95 -
COMETIC Top End Gaskets - Kawasaki C3619
COMETIC
$91.95COMETIC Top End Gaskets Kawasaki C3619Gaskets 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.09345418- SKU:
- 09345418
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET SET
- TYPE:
- TOP END
- UNITS:
- SET
- RIDING STYLE:
- OFF-ROAD
$91.95Qty in Cart: 0Quantity:Price:$91.95Subtotal: -
COMETIC Clutch Gasket - CR80 C7492
COMETIC
$10.95COMETIC Clutch Gasket CR80 C7492Clutch cover gaskets are made form an AFM Material which is a chemically blown, compounded nitrile synthetic rubber bonded to an aluminum core, Aluminum core gives the gasket strength for a superior seal and prevents the...C7492- SKU:
- C7492
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
- MODEL:
- HI-PERFORMANCE
$10.95Qty in Cart: 0Quantity:Price:$10.95Subtotal: -
COMETIC Top End Gasket Set - XR650 C7681
COMETIC
$47.95COMETIC Top End Gasket Set XR650 C7681Top 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...C7681- SKU:
- C7681
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- BORE SIZE METRIC:
- 101.00 MM
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- TOP END
- UNITS:
- KIT
$47.95 -
COMETIC Top End Gasket Set - Husqvarna C7734
COMETIC
$29.95COMETIC Top End Gasket Set Husqvarna C7734Top 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...C7734- SKU:
- C7734
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- BORE SIZE METRIC:
- 54.00 MM
- THICKNESS IMPERIAL:
- 0,012'
- THICKNESS METRIC:
- 0.31 MM
- TYPE:
- TOP END
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
$29.95Qty in Cart: 0Quantity:Price:$29.95Subtotal: -
COMETIC Top End Gasket Set - Honda C7757
COMETIC
$47.95COMETIC Top End Gasket Set Honda C7757Top 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...C7757- SKU:
- C7757
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- BORE SIZE METRIC:
- 54.00 MM
- THICKNESS IMPERIAL:
- 0,012'
- THICKNESS METRIC:
- 0.31 MM
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$47.95 -
COMETIC Top End Gasket Set C7726
COMETIC
$35.95COMETIC Top End Gasket Set C7726Top 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...09341037- SKU:
- 09341037
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
- BORE SIZE METRIC:
- 75.00 MM
- PRODUCT NAME:
- GASKET KIT
$35.95 -
COMETIC Bottom End Gasket Set - Yamaha C3057BE
COMETIC
$90.95COMETIC Bottom End Gasket Set Yamaha C3057BEBottom end gasket kits include correct oil seals, O-rings, drain plug washers and water pump cover gaskets as needed, Materials will vary depending on what is correct and engineered for specified application,...09344080- SKU:
- 09344080
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- BOTTOM END
- MODEL:
- HI-PERFORMANCE
- UNITS:
- KIT
$90.95 -
COMETIC Top End Gasket Set - Kawasaki C3501
COMETIC
$33.95COMETIC Top End Gasket Set Kawasaki C3501Top 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...09344186- SKU:
- 09344186
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- TOP END
- BORE SIZE METRIC:
- 48.50 MM
- RIDING STYLE:
- OFF-ROAD
$33.95Qty in Cart: 0Quantity:Price:$33.95Subtotal:
