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 Crankshaft Kit CBK0104
HOT RODS
$278.20A stroker crankshaft fundamentally increases your engine's displacement and torque output, delivering the low-end power and sustained performance necessary for competitive racing or high-demand...09210346- SKU:
- 09210346
- Availability:
- Ships Same Business Day
- Weight:
- 7.15 LBS
- PRODUCT NAME:
- CRANKSHAFT KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- OEM
$278.20 -
HOT RODS Crankshaft Kit CBK0103
HOT RODS
$500.80If you're building a high-performance engine or need to replace a worn crankshaft, the HOT RODS Crankshaft Kit CBK0103 delivers factory-matched reliability with the durability to handle sustained...09210345- SKU:
- 09210345
- Availability:
- Ships Same Business Day
- Weight:
- 6.60 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- CRANKSHAFT KIT
- TYPE:
- OEM
$500.80 -
HOT RODS Crankshaft Kit CBK0076
HOT RODS
$343.95If you're building a high-performance engine or planning a stroker kit upgrade, the HOT RODS Crankshaft Kit CBK0076 delivers the durability and precision you need to handle sustained power increases...09210324- SKU:
- 09210324
- Availability:
- Ships Same Business Day
- Weight:
- 6.55 LBS
- TYPE:
- OEM
- PRODUCT NAME:
- CRANKSHAFT KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$343.95 -
HOT RODS Crankshaft Kit CBK0075
HOT RODS
$397.95If you're building a high-performance engine or restoring a classic that demands more displacement and power, the HOT RODS Crankshaft Kit CBK0075 delivers the precision engineering and durability you...09210323- SKU:
- 09210323
- Availability:
- Ships Same Business Day
- Weight:
- 6.55 LBS
- PRODUCT NAME:
- CRANKSHAFT KIT
- TYPE:
- OEM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$397.95 -
HOT RODS Crankshaft Kit CBK0031
HOT RODS
$662.95The HOT RODS Crankshaft Kit CBK0031 delivers factory-spec performance with the durability to handle high-RPM demands and forced-induction applications. This complete assembly arrives pre-assembled...09210287- SKU:
- 09210287
- Availability:
- Ships Same Business Day
- Weight:
- 10.17 LBS
- PRODUCT NAME:
- CRANKSHAFT KIT
- TYPE:
- OEM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$662.95 -
HOT RODS Crankshaft Kit CBK0029
HOT RODS
$445.15Whether you're building a high-displacement stroker engine or replacing a worn crankshaft, the HOT RODS Crankshaft Kit CBK0029 delivers the durability and precision you need for sustained high-RPM...09210286- SKU:
- 09210286
- Availability:
- Ships Same Business Day
- Weight:
- 6.15 LBS
- PRODUCT NAME:
- CRANKSHAFT KIT
- TYPE:
- OEM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$445.15 -
HOT RODS Crankshaft Kit CBK0028
HOT RODS
$741.95If you're building or rebuilding a high-performance engine, the foundation matters—and that's where the HOT RODS Crankshaft Kit CBK0028 comes in. This factory-assembled crankshaft comes complete with...09210285- SKU:
- 09210285
- Availability:
- Ships Same Business Day
- Weight:
- 9.70 LBS
- PRODUCT NAME:
- CRANKSHAFT KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- OEM
$741.95Qty in Cart: 0Quantity:Price:$741.95Subtotal: -
HOT RODS Crankshaft Kit CBK0026
HOT RODS
$752.80If you're building a high-performance engine or need to restore your crankshaft assembly to factory specifications, the HOT RODS Crankshaft Kit CBK0026 delivers the reliability and precision you...09210284- SKU:
- 09210284
- Availability:
- Ships Same Business Day
- Weight:
- 11.96 LBS
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- CRANKSHAFT KIT
- TYPE:
- OEM
$752.80 -
HOT RODS Crankshaft Kit CBK0024
HOT RODS
$531.95If you're serious about building an engine that rivals or exceeds OEM performance standards, the HOT RODS Crankshaft Kit CBK0024 delivers factory-assembled reliability without factory limitations...09210282- SKU:
- 09210282
- Availability:
- Ships Same Business Day
- Weight:
- 12.25 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- CRANKSHAFT KIT
- TYPE:
- OEM
$531.95 -
HOT RODS Crankshaft Kit CBK0022
HOT RODS
$423.95If you're building a high-performance engine or need a reliable replacement crankshaft assembly, the HOT RODS Crankshaft Kit CBK0022 delivers factory-spec precision with proven durability. This...09210280- SKU:
- 09210280
- Availability:
- Ships Same Business Day
- Weight:
- 8.18 LBS
- TYPE:
- OEM
- UNITS:
- KIT
- PRODUCT NAME:
- CRANKSHAFT KIT
- RIDING STYLE:
- OFF-ROAD
$423.95 -
HOT RODS Crankshaft Kit CBK0021
HOT RODS
$397.95If you're building a high-performance engine or restoring a classic with serious power ambitions, a quality crankshaft assembly is non-negotiable. The HOT RODS Crankshaft Kit CBK0021 delivers...09210279- SKU:
- 09210279
- Availability:
- Ships Same Business Day
- Weight:
- 8.75 LBS
- PRODUCT NAME:
- CRANKSHAFT KIT
- TYPE:
- OEM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$397.95Qty in Cart: 0Quantity:Price:$397.95Subtotal: -
HOT RODS Crankshaft Kit CBK0020
HOT RODS
$397.95If you're building a high-performance engine or pushing your existing platform to the limit, a quality crankshaft assembly is non-negotiable. The HOT RODS Crankshaft Kit CBK0020 delivers factory-spec...09210278- SKU:
- 09210278
- Availability:
- Ships Same Business Day
- Weight:
- 9.35 LBS
- TYPE:
- OEM
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- CRANKSHAFT KIT
- UNITS:
- KIT
$397.95 -
HOT RODS Crankshaft Kit CBK0019
HOT RODS
$417.85If you're building a high-performance engine or restoring a classic with modern reliability, a quality crankshaft assembly is non-negotiable. The HOT RODS Crankshaft Kit CBK0019 ships...09210277- SKU:
- 09210277
- Availability:
- Ships Same Business Day
- Weight:
- 8.65 LBS
- TYPE:
- OEM
- PRODUCT NAME:
- CRANKSHAFT KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$417.85 -
HOT RODS Crankshaft Kit CBK0018
HOT RODS
$417.85If you're building or rebuilding an engine for serious performance, your crankshaft needs to handle extreme loads without compromise. The HOT RODS Crankshaft Kit CBK0018 delivers factory-matched...09210276- SKU:
- 09210276
- Availability:
- Ships Same Business Day
- Weight:
- 8.80 LBS
- TYPE:
- OEM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- CRANKSHAFT KIT
$417.85 -
HOT RODS Crankshaft Kit CBK0017
HOT RODS
$779.05If you're building a high-performance engine or need to replace a worn crankshaft assembly, the HOT RODS Crankshaft Kit CBK0017 delivers factory-matched reliability with the durability demanded by...09210275- SKU:
- 09210275
- Availability:
- Ships Same Business Day
- Weight:
- 12.90 LBS
- PRODUCT NAME:
- CRANKSHAFT KIT
- TYPE:
- OEM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$779.05 -
HOT RODS Crankshaft Kit CBK0015
HOT RODS
$595.95If you're building a high-displacement engine or need a crankshaft assembly that meets OEM specs without compromise, the HOT RODS Crankshaft Kit CBK0015 delivers factory-assembled reliability with...09210274- SKU:
- 09210274
- Availability:
- Ships Same Business Day
- Weight:
- 12.40 LBS
- PRODUCT NAME:
- CRANKSHAFT KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- OEM
- UNITS:
- KIT
$595.95Qty in Cart: 0Quantity:Price:$595.95Subtotal: -
HOT RODS Crankshaft Kit CBK0014
HOT RODS
$502.95If you're building or rebuilding a high-performance engine, your crankshaft is the foundation of reliability and power delivery. The HOT RODS Crankshaft Kit CBK0014 arrives factory-assembled and true...09210273- SKU:
- 09210273
- Availability:
- Ships Same Business Day
- Weight:
- 8.10 LBS
- PRODUCT NAME:
- CRANKSHAFT KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- OEM
$502.95 -
HOT RODS Crankshaft Kit CBK0013
HOT RODS
$528.10If you're building a high-performance engine or refreshing a tired bottom end, the HOT RODS Crankshaft Kit CBK0013 delivers factory-spec reliability with the durability to handle increased output...09210272- SKU:
- 09210272
- Availability:
- Ships Same Business Day
- Weight:
- 8.50 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- CRANKSHAFT KIT
- TYPE:
- OEM
$528.10 -
HOT RODS Crankshaft 4028
HOT RODS
$556.95Whether you're pushing your ATV to the limit on the track or maximizing reliability in demanding conditions, a robust crankshaft is the foundation of engine durability. The HOT RODS Crankshaft 4028...09210237- SKU:
- 09210237
- Availability:
- Ships Same Business Day
- Weight:
- 10.01 LBS
- MATERIAL:
- 4140 STEEL
- UNITS:
- ASSEMBLY
- MODEL:
- 2-CYCLE
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- STEEL
- FEATURES:
- STANDARD CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 72.00 MM
- TYPE:
- OEM STROKE
- DISPLACEMENT:
- 250 CC TO 300 CC
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
$556.95 -
HOT RODS Crankshaft 4066
HOT RODS
$318.95If you're building a high-displacement ATV engine or restoring a damaged crankshaft, the HOT RODS 4066 delivers factory-proven reliability without the machine work and custom fabrication typically...09210075- SKU:
- 09210075
- Availability:
- Ships Same Business Day
- Weight:
- 4.61 LBS
- DISPLACEMENT:
- 85 CC TO 100 CC
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- MODEL:
- 2-CYCLE
- FEATURES:
- STANDARD CRANKSHAFT
- STROKE LENGTH METRIC:
- 45.80 MM
- TYPE:
- OEM STROKE
- COLOR/FINISH:
- STEEL
- MATERIAL:
- 4140 STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- ASSEMBLY
$318.95
