Dirt Bike Engine
Dirt Bike Engine Parts at JJ Motorsports
Discover a full range of dirt bike engine components for rebuilding or upgrading your performance from JJ Motorsports. 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 to keep your engine running at peak efficiency on the track or trails.
Shop trusted brands like Wiseco for forged piston kits and K&N for high-flow oil filters. Explore related categories such as Dirt Bike Air and Fuel for intake upgrades or Dirt Bike Exhaust for complete systems.
Browse our in-stock inventory below with same-day shipping and expert support. Questions? Contact us for fitment advice!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
-
HOT RODS Crank Bearings K003
HOT RODS
$99.95HOT RODS Crank Bearings K003Precision, high-quality main bearing and seal kits complement installation of Hot Rods crankshaft assemblies09240022- SKU:
- 09240022
- Availability:
- Ships Same Business Day
- Weight:
- 1.40 LBS
- PRODUCT NAME:
- BEARING
- TYPE:
- BALL
- APPLICATION:
- MAIN CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$99.95 -
HOT RODS Crank Bearings K019
HOT RODS
$79.95HOT RODS Crank Bearings K019Precision, high-quality main bearing and seal kits complement installation of Hot Rods crankshaft assemblies09240023- SKU:
- 09240023
- Availability:
- Ships Same Business Day
- Weight:
- 1.60 LBS
- APPLICATION:
- MAIN CRANKSHAFT
- TYPE:
- BALL
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$79.95 -
HOT RODS Crank Bearings K004
HOT RODS
$72.95HOT RODS Crank Bearings K004Precision, high-quality main bearing and seal kits complement installation of Hot Rods crankshaft assemblies09240024- SKU:
- 09240024
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- APPLICATION:
- MAIN CRANKSHAFT
- UNITS:
- KIT
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- BALL
$72.95 -
HOT RODS Crank Bearings K005
HOT RODS
$109.95HOT RODS Crank Bearings K005Precision, high-quality main bearing and seal kits complement installation of Hot Rods crankshaft assemblies09240025- SKU:
- 09240025
- Availability:
- Ships Same Business Day
- Weight:
- 1.38 LBS
- APPLICATION:
- MAIN CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- BEARING
- TYPE:
- BALL
- RIDING STYLE:
- STREET
$109.95Qty in Cart: 0Quantity:Price:$109.95Subtotal: -
HOT RODS Crank Bearings K227
HOT RODS
$119.95HOT RODS Crank Bearings K227Precision, high-quality main bearing and seal kits complement installation of Hot Rods crankshaft assemblies09240026- SKU:
- 09240026
- Availability:
- Ships Same Business Day
- Weight:
- 1.60 LBS
- APPLICATION:
- MAIN CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- BEARING
- TYPE:
- BALL
$119.95 -
HOT RODS Crank Bearings K020
HOT RODS
$61.95HOT RODS Crank Bearings K020Precision, high-quality main bearing and seal kits complement installation of Hot Rods crankshaft assemblies09240027- SKU:
- 09240027
- Availability:
- Ships Same Business Day
- Weight:
- 0.74 LBS
- APPLICATION:
- MAIN CRANKSHAFT
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- BALL
$61.95 -
HOT RODS Crank Bearings K006
HOT RODS
$108.95HOT RODS Crank Bearings K006Precision, high-quality main bearing and seal kits complement installation of Hot Rods crankshaft assemblies09240028- SKU:
- 09240028
- Availability:
- Ships Same Business Day
- Weight:
- 0.88 LBS
- TYPE:
- BALL
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- MAIN CRANKSHAFT
- UNITS:
- KIT
$108.95 -
HOT RODS Crank Bearings K008
HOT RODS
$60.95HOT RODS Crank Bearings K008Precision, high-quality main bearing and seal kits complement installation of Hot Rods crankshaft assemblies09240030- SKU:
- 09240030
- Availability:
- Ships Same Business Day
- Weight:
- 0.67 LBS
- PRODUCT NAME:
- BEARING
- TYPE:
- BALL
- APPLICATION:
- MAIN CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$60.95 -
HOT RODS Crankshaft 4022
HOT RODS
$564.95HOT RODS Crankshaft 4022Assembly sold complete with Hot Rods connecting rod, Factory assembled and trued to OEM specifications, Hot Rods cranks will meet or surpass the OEM in performance, Ready for installation, Crankshaft is completely rebuild-able...09210546- SKU:
- 09210546
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- DISPLACEMENT:
- 250 CC
- MATERIAL:
- 4140 STEEL
- STROKE LENGTH METRIC:
- 53.60 MM
- UNITS:
- ASSEMBLY
- COLOR/FINISH:
- STEEL
- FEATURES:
- STANDARD CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- OEM STROKE
- MODEL:
- 4-CYCLE
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
$564.95 -
HOT RODS Bottom End Kit CBK0209
HOT RODS
$484.95HOT RODS Bottom End Kit CBK0209Kit features everything needed to complete crankshaft installation including Hot Rods main bearings and seals kit plus a complete engine gasket set that includes all gaskets and seals for a complete engine rebuild, "Stroker...09210572- SKU:
- 09210572
- Availability:
- Ships Same Business Day
- Weight:
- 7.00 LBS
- DISPLACEMENT:
- 108 CC
- MATERIAL:
- 4140 STEEL
- STROKE LENGTH METRIC:
- +4.00 MM
- UNITS:
- KIT
- COLOR/FINISH:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- STROKER
- MODEL:
- 2-CYCLE
- PRODUCT NAME:
- BOTTOM END KIT
$484.95 -
HOT RODS Bottom End Kit CBK0207
HOT RODS
$492.95HOT RODS Bottom End Kit CBK0207Kit features everything needed to complete crankshaft installation including Hot Rods main bearings and seals kit plus a complete engine gasket set that includes all gaskets and seals for a complete engine rebuild, "Stroker...09210573- SKU:
- 09210573
- Availability:
- Ships Same Business Day
- Weight:
- 6.70 LBS
- COLOR/FINISH:
- STEEL
- MATERIAL:
- 4140 STEEL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- OE REPLACEMENT
- UNITS:
- KIT
- MODEL:
- 2-CYCLE
- PRODUCT NAME:
- BOTTOM END KIT
- STROKE LENGTH METRIC:
- STANDARD
$492.95 -
HOT RODS Bottom End Kit CBK0205
HOT RODS
$663.95HOT RODS Bottom End Kit CBK0205Kit features everything needed to complete crankshaft installation including Hot Rods main bearings and seals kit plus a complete engine gasket set that includes all gaskets and seals for a complete engine rebuild, "Stroker...09210576- SKU:
- 09210576
- Availability:
- Ships Same Business Day
- Weight:
- 10.00 LBS
- MODEL:
- 4-CYCLE
- UNITS:
- KIT
- MATERIAL:
- 4140 STEEL
- STROKE LENGTH METRIC:
- STANDARD
- TYPE:
- OE REPLACEMENT
- COLOR/FINISH:
- STEEL
- PRODUCT NAME:
- BOTTOM END KIT
- RIDING STYLE:
- OFF-ROAD
$663.95 -
HOT RODS Crankshaft Kit CBK0091
HOT RODS
$441.95HOT RODS Crankshaft Kit CBK0091Assembly 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...09210336- SKU:
- 09210336
- Availability:
- Ships Same Business Day
- Weight:
- 8.25 LBS
- PRODUCT NAME:
- CRANKSHAFT KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- OEM
$441.95 -
HOT RODS Crankshaft Kit CBK0092
HOT RODS
$465.95HOT RODS Crankshaft Kit CBK0092Assembly 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...09210337- SKU:
- 09210337
- Availability:
- Ships Same Business Day
- Weight:
- 11.95 LBS
- TYPE:
- OEM
- PRODUCT NAME:
- CRANKSHAFT KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$465.95 -
HOT RODS Crankshaft Kit CBK0093
HOT RODS
$638.95HOT RODS Crankshaft Kit CBK0093Assembly 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...09210338- SKU:
- 09210338
- Availability:
- Ships Same Business Day
- Weight:
- 12.85 LBS
- PRODUCT NAME:
- CRANKSHAFT KIT
- TYPE:
- OEM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$638.95 -
HOT RODS Crankshaft Kit CBK0094
HOT RODS
$663.95HOT RODS Crankshaft Kit CBK0094Assembly 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...09210339- SKU:
- 09210339
- Availability:
- Ships Same Business Day
- Weight:
- 12.55 LBS
- TYPE:
- OEM
- UNITS:
- KIT
- PRODUCT NAME:
- CRANKSHAFT KIT
- RIDING STYLE:
- OFF-ROAD
$663.95 -
HOT RODS Crankshaft Kit CBK0095
HOT RODS
$809.95HOT RODS Crankshaft Kit CBK0095Assembly 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...09210340- SKU:
- 09210340
- Availability:
- Ships Same Business Day
- Weight:
- 13.35 LBS
- PRODUCT NAME:
- CRANKSHAFT KIT
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TYPE:
- OEM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$809.95 -
HOT RODS Crankshaft Kit CBK0099
HOT RODS
$686.95HOT RODS Crankshaft Kit CBK0099Assembly 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...09210341- SKU:
- 09210341
- Availability:
- Ships Same Business Day
- Weight:
- 9.90 LBS
- TYPE:
- OEM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- CRANKSHAFT KIT
$686.95 -
HOT RODS Crankshaft Kit CBK0100
HOT RODS
$392.95HOT RODS Crankshaft Kit CBK0100Assembly 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...09210342- SKU:
- 09210342
- Availability:
- Ships Same Business Day
- Weight:
- 6.30 LBS
- TYPE:
- OEM
- PRODUCT NAME:
- CRANKSHAFT KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$392.95 -
HOT RODS Crankshaft Kit CBK0101
HOT RODS
$392.95HOT RODS Crankshaft Kit CBK0101Assembly 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...09210343- SKU:
- 09210343
- Availability:
- Ships Same Business Day
- Weight:
- 6.60 LBS
- PRODUCT NAME:
- CRANKSHAFT KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- OEM
- UNITS:
- KIT
$392.95
