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
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HOT RODS Crank Bearings K068
HOT RODS
$133.95A crankshaft assembly is only as reliable as its bearing package. The HOT RODS K068 Crank Bearings deliver precision-engineered main bearing and seal kits that eliminate guesswork during installation and ensure proper load distribution under extreme...09240235- SKU:
- 09240235
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- APPLICATION:
- MAIN CRANKSHAFT
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- BALL
$133.95Qty in Cart: 0Quantity:Price:$133.95Subtotal: -
HOT RODS Crank Bearings K007
HOT RODS
$62.95A crankshaft is only as reliable as its bearing system. The HOT RODS K007 crank bearing kit delivers the precision tolerances and seal integrity required to handle sustained high-RPM loads without compromise. Whether you're rebuilding a race engine or...09240245- SKU:
- 09240245
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- MAIN CRANKSHAFT
- UNITS:
- KIT
- TYPE:
- BALL
$62.95Qty in Cart: 0Quantity:Price:$62.95Subtotal: -
HOT RODS Crank Bearings K070
HOT RODS
$100.95A crankshaft is only as reliable as its bearing package. The HOT RODS K070 crank bearing kit delivers precision-engineered main bearings and seals that eliminate play, reduce friction, and ensure consistent oil pressure across the entire stroke. Whether...09240246- SKU:
- 09240246
- Availability:
- Ships Same Business Day
- Weight:
- 1.80 LBS
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- ATV
- TYPE:
- BALL
- UNITS:
- SET
- APPLICATION:
- MAIN CRANKSHAFT
$100.95 -
HOT RODS Crank Bearings K074
HOT RODS
$118.95A crankshaft is only as reliable as its bearings. The HOT RODS K074 crank bearing kit delivers precision-engineered main bearing and seal components designed to handle the demanding loads of high-performance engines. Whether you're rebuilding a race...09240283- SKU:
- 09240283
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- APPLICATION:
- MAIN CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- BEARING
- TYPE:
- BALL
$118.95 -
HOT RODS Crank Bearings K083
HOT RODS
$45.95A crankshaft is only as reliable as its bearings. The HOT RODS K083 Crank Bearings deliver the precision fit and durability required for high-RPM applications, whether you're rebuilding a stock engine or pushing forced induction limits. These bearings...09240286- SKU:
- 09240286
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PRODUCT NAME:
- BEARING
- TYPE:
- BALL
- APPLICATION:
- MAIN CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$45.95 -
HOT RODS Crank Bearings K090
HOT RODS
$82.95A crankshaft is only as reliable as its bearing seals. The HOT RODS K090 Crank Bearings Seal Kit ensures proper fluid retention and contamination protection during and after installation of your HOT RODS crankshaft assembly, preventing premature wear and...09240399- SKU:
- 09240399
- Availability:
- Ships Same Business Day
- Weight:
- 1.30 LBS
- APPLICATION:
- MAIN CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- BEARING SET
- RIDING STYLE:
- STREET
$82.95Qty in Cart: 0Quantity:Price:$82.95Subtotal: -
HOT RODS Crank Bearings K091
HOT RODS
$83.95A quality crankshaft assembly is only as reliable as its sealing system. The HOT RODS Crank Bearings K091 seal kit provides the critical barrier between your engine's internal lubrication and external contaminants, ensuring consistent oil pressure and...09240400- SKU:
- 09240400
- Availability:
- Ships Same Business Day
- Weight:
- 1.50 LBS
- APPLICATION:
- MAIN CRANKSHAFT
- PRODUCT NAME:
- BEARING SET
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
$83.95 -
HOT RODS Crank Bearings K092
HOT RODS
$165.95A quality crankshaft seal kit is non-negotiable if you're installing a Hot Rods crank assembly—it ensures critical oil containment and prevents leakage that could compromise engine performance or cause catastrophic failure. The K092 seal kit is...09240401- SKU:
- 09240401
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- APPLICATION:
- MAIN CRANKSHAFT
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- BEARING SET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$165.95 -
HOT RODS Bottom End Kit CBK0171
HOT RODS
$835.95A complete bottom-end rebuild demands precision components and comprehensive gasket coverage—this kit eliminates the guesswork by bundling everything you need for crankshaft installation in one package. Whether you're freshening a stock engine or...09210581- SKU:
- 09210581
- Availability:
- Ships Same Business Day
- Weight:
- 13.55 LBS
- MATERIAL:
- 4140 STEEL
- UNITS:
- KIT
- COLOR/FINISH:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- MODEL:
- 4-CYCLE
- TYPE:
- OE REPLACEMENT
- PRODUCT NAME:
- BOTTOM END KIT
- STROKE LENGTH METRIC:
- STANDARD
$835.95 -
HOT RODS Bottom End Kit CBK0172
HOT RODS
$741.95A complete bottom-end rebuild requires precision components and meticulous attention to detail—this kit eliminates guesswork by bundling everything you need in one box. Whether you're refreshing a tired engine or installing a stroker crank, the HOT RODS...09210582- SKU:
- 09210582
- Availability:
- Ships Same Business Day
- Weight:
- 11.05 LBS
- MATERIAL:
- 4140 STEEL
- MODEL:
- 4-CYCLE
- STROKE LENGTH METRIC:
- STANDARD
- TYPE:
- OE REPLACEMENT
- COLOR/FINISH:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- BOTTOM END KIT
$741.95 -
HOT RODS Bottom End Kit CBK0194
HOT RODS
$595.95A complete bottom-end rebuild demands precision components and comprehensive gasket coverage—this kit eliminates the guesswork by bundling everything you need for crankshaft installation in one package. Whether you're assembling a stroker engine or...09210585- SKU:
- 09210585
- Availability:
- Ships Same Business Day
- Weight:
- 10.35 LBS
- MODEL:
- 4-CYCLE
- UNITS:
- KIT
- MATERIAL:
- 4140 STEEL
- STROKE LENGTH METRIC:
- STANDARD
- COLOR/FINISH:
- STEEL
- PRODUCT NAME:
- BOTTOM END KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- OE REPLACEMENT
$595.95 -
HOT RODS Crankshaft Kit CBK0003
HOT RODS
$768.95If you're building a high-displacement engine or seeking measurable power gains, a stroker crankshaft assembly is one of the most effective upgrades available. The HOT RODS Crankshaft Kit CBK0003 delivers factory-spec reliability while offering increased...09210262- SKU:
- 09210262
- Availability:
- Ships Same Business Day
- Weight:
- 9.80 LBS
- PRODUCT NAME:
- CRANKSHAFT KIT
- TYPE:
- OEM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$768.95 -
HOT RODS Crankshaft Kit CBK0005
HOT RODS
$768.95The HOT RODS Crankshaft Kit CBK0005 delivers a factory-assembled, performance-proven crankshaft assembly that meets or exceeds OEM specifications without compromise. If you're building a stroker engine or replacing a worn crank, this kit eliminates the...09210264- SKU:
- 09210264
- Availability:
- Ships Same Business Day
- Weight:
- 12.30 LBS
- TYPE:
- OEM
- PRODUCT NAME:
- CRANKSHAFT KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$768.95 -
HOT RODS Crankshaft Kit CBK0084
HOT RODS
$716.95If you're building a high-performance engine or need to replace a worn crankshaft, the HOT RODS CBK0084 delivers factory-matched precision with the durability to handle demanding track conditions. This complete assembly arrives ready for installation,...09210329- SKU:
- 09210329
- Availability:
- Ships Same Business Day
- Weight:
- 10.00 LBS
- PRODUCT NAME:
- CRANKSHAFT KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- OEM
- UNITS:
- KIT
$716.95 -
HOT RODS Crankshaft Kit CBK0085
HOT RODS
$502.95If you're building a high-performance engine or restoring a classic to exceed factory specs, the HOT RODS Crankshaft Kit CBK0085 delivers the reliability and performance you need without compromise. This complete assembly arrives factory-assembled and...09210330- SKU:
- 09210330
- Availability:
- Ships Same Business Day
- Weight:
- 6.50 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- CRANKSHAFT KIT
- TYPE:
- OEM
$502.95Qty in Cart: 0Quantity:Price:$502.95Subtotal: -
HOT RODS Crankshaft Kit CBK0086
HOT RODS
$716.95If you're building a high-performance engine or refreshing a worn bottom end, the HOT RODS Crankshaft Kit CBK0086 delivers the reliability and performance you need without compromise. This factory-assembled complete crankshaft and connecting rod assembly...09210331- SKU:
- 09210331
- Availability:
- Ships Same Business Day
- Weight:
- 13.30 LBS
- PRODUCT NAME:
- CRANKSHAFT KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- OEM
- UNITS:
- KIT
$716.95 -
HOT RODS Crankshaft Kit CBK0087
HOT RODS
$716.95If you're building or rebuilding a high-performance engine, the HOT RODS Crankshaft Kit CBK0087 delivers the reliability and durability you need to handle sustained power and RPM demands. This factory-assembled unit meets or surpasses OEM specifications,...09210332- SKU:
- 09210332
- Availability:
- Ships Same Business Day
- Weight:
- 10.51 LBS
- PRODUCT NAME:
- CRANKSHAFT KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- OEM
- UNITS:
- KIT
$716.95 -
HOT RODS Crankshaft Kit CBK0088
HOT RODS
$768.95If you're building a high-performance engine or restoring a classic with upgraded displacement, the HOT RODS Crankshaft Kit CBK0088 delivers the reliability and precision you need for consistent power delivery across the RPM band. This factory-assembled...09210333- SKU:
- 09210333
- Availability:
- Ships Same Business Day
- Weight:
- 12.25 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- CRANKSHAFT KIT
- TYPE:
- OEM
$768.95 -
HOT RODS Crankshaft Kit CBK0089
HOT RODS
$370.95If you're building a high-performance engine or restoring a classic with modern reliability in mind, the HOT RODS Crankshaft Kit CBK0089 delivers the precision engineering you need without compromise. This factory-assembled unit meets or exceeds OEM...09210334- SKU:
- 09210334
- Availability:
- Ships Same Business Day
- Weight:
- 8.70 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- CRANKSHAFT KIT
- TYPE:
- OEM
$370.95 -
HOT RODS Crankshaft Kit CBK0090
HOT RODS
$502.95If you're building a high-performance engine or restoring a classic with serious power ambitions, the HOT RODS Crankshaft Kit CBK0090 delivers the reliability and stroke length you need to maximize displacement and torque. This factory-assembled unit...09210335- SKU:
- 09210335
- Availability:
- Ships Same Business Day
- Weight:
- 8.00 LBS
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- CRANKSHAFT KIT
- TYPE:
- OEM
$502.95
