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 Connecting Rod 8718
HOT RODS
$159.95A connecting rod failure at high RPM can mean catastrophic engine damage and a DNF. The HOT RODS 8718 is engineered with 8620 AISI certified steel and precision-machined components to handle...09230564- SKU:
- 09230564
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- CONNECTING ROD KIT
- MATERIAL:
- 8620 STEEL
$159.95 -
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...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...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...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
$100.95Qty in Cart: 0Quantity:Price:$100.95Subtotal: -
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...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...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...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...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...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...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...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
$741.95Qty in Cart: 0Quantity:Price:$741.95Subtotal: -
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...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...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...09210264- SKU:
- 09210264
- Availability:
- Ships Same Business Day
- Weight:
- 12.30 LBS
- TYPE:
- OEM
- PRODUCT NAME:
- CRANKSHAFT KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$768.95Qty in Cart: 0Quantity:Price:$768.95Subtotal: -
HOT RODS Crankshaft Kit CBK0084
HOT RODS
$752.80If 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...09210329- SKU:
- 09210329
- Availability:
- Ships Same Business Day
- Weight:
- 10.00 LBS
- PRODUCT NAME:
- CRANKSHAFT KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- OEM
- UNITS:
- KIT
$752.80Qty in Cart: 0Quantity:Price:$752.80Subtotal: -
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...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...09210331- SKU:
- 09210331
- Availability:
- Ships Same Business Day
- Weight:
- 13.30 LBS
- PRODUCT NAME:
- CRANKSHAFT KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- OEM
- UNITS:
- KIT
$716.95Qty in Cart: 0Quantity:Price:$716.95Subtotal: -
HOT RODS Crankshaft Kit CBK0087
HOT RODS
$752.80If 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...09210332- SKU:
- 09210332
- Availability:
- Ships Same Business Day
- Weight:
- 10.51 LBS
- PRODUCT NAME:
- CRANKSHAFT KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- OEM
- UNITS:
- KIT
$752.80 -
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...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...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
