Dirt Bike Crankshafts and Parts
Dirt Bike Crankshafts & Bottom End Rebuild Kits for KTM, Husqvarna, Gas Gas & Suzuki at JJ Motorsports
Rebuild your dirt bike's bottom end with premium crankshaft assemblies and complete kits from JJ Motorsports, precision-engineered for perfect balance, maximum strength, and race-proven reliability in motocross, enduro, and trail riding. Our selection includes OEM-spec Hot Rods crankshafts and full Wossner crankshaft assemblies with rods, bearings, and seals for leak-free operation and extended engine life under extreme RPM and load. Compatible with KTM SX/EXC, Husqvarna FC/FE, Gas Gas MC/EC, and Suzuki RM-Z models, these high-quality components ensure smoother power delivery, reduced vibration, and championship-level durability in dusty, high-stress conditions. Whether refreshing a tired motor or building a stroker, Hot Rods and Wossner deliver exact OEM stroke, balanced cranks, and bolt-in fitment, and unmatched performance for 250-450cc 2-stroke and 4-stroke engines.
At JJ Motorsports, we stock the best dirt bike crankshafts and bottom-end kits from Hot Rods and Wossner with fast shipping and expert support. Free shipping over $99!
Top Dirt Bike Crankshafts & Bottom End Kits
- Wossner Crankshaft Assembly Gas Gas/Husqvarna/KTM CS2070 – Premium forged crankshaft assembly for Gas Gas, Husqvarna, and KTM 250/300 models; perfectly balanced for high-RPM reliability and smooth power.
- Wossner Crankshaft Assembly Husaberg/Husqvarna/KTM CS2012 – High-performance crankshaft for older Husaberg and current Husqvarna/KTM platforms; engineered for extreme durability and precise fit.
- Hot Rods OE Crankshaft Replacement Kit Suzuki CBK0081 – Complete OEM-spec crankshaft assembly for Suzuki RM-Z models; includes balanced crank, rod, bearings, and seals for factory performance and easy installation.
Browse our in-stock inventory below with same-day shipping and expert support. Free shipping on orders over $99! Questions? Contact us for fitment advice!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
-
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 -
HOT RODS Crankshaft Kit CBK0128
HOT RODS
$741.95Whether you're building a stroker engine or replacing a worn OEM crankshaft, the HOT RODS CBK0128 Crankshaft Kit delivers factory-matched precision with measurable performance gains. This complete assembly arrives factory-assembled and true to OEM...09210362- SKU:
- 09210362
- Availability:
- Ships Same Business Day
- Weight:
- 10.64 LBS
- PRODUCT NAME:
- CRANKSHAFT KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- OEM
$741.95 -
HOT RODS Crankshaft Kit CBK0129
HOT RODS
$835.95If you're building a high-performance engine that demands reliability under extreme conditions, the HOT RODS Crankshaft Kit CBK0129 delivers the precision and durability you need. This factory-assembled crankshaft meets or exceeds OEM specifications...09210363- SKU:
- 09210363
- Availability:
- Ships Same Business Day
- Weight:
- 13.10 LBS
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- CRANKSHAFT KIT
- TYPE:
- OEM
$835.95 -
HOT RODS Crankshaft Kit CBK0133
HOT RODS
$442.95A quality crankshaft is the foundation of engine reliability and performance—especially if you're pushing your build beyond stock parameters. The HOT RODS Crankshaft Kit CBK0133 arrives factory-assembled and pre-checked to meet or exceed OEM...09210365- SKU:
- 09210365
- Availability:
- Ships Same Business Day
- Weight:
- 6.60 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- CRANKSHAFT KIT
- TYPE:
- STROKER
$442.95 -
HOT RODS Crankshaft Kit CBK0134
HOT RODS
$370.95If you're building a high-displacement engine or need a crankshaft that matches OEM specifications without compromise, the HOT RODS Crankshaft Kit CBK0134 delivers factory-level precision with proven durability. This complete assembly arrives ready for...09210366- SKU:
- 09210366
- Availability:
- Ships Same Business Day
- Weight:
- 6.07 LBS
- PRODUCT NAME:
- CRANKSHAFT KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- STROKER
$370.95 -
HOT RODS Crankshaft 4024
HOT RODS
$476.95A high-performance crankshaft built to withstand the demands of serious ATV racing and trail riding. The HOT RODS 4024 arrives factory-assembled and pre-trued to OEM specifications, eliminating guesswork and machine work—you get a complete,...09210234- SKU:
- 09210234
- Availability:
- Ships Same Business Day
- Weight:
- 6.80 LBS
- RIDING STYLE:
- OFF-ROAD
- DISPLACEMENT:
- 125 CC
- MATERIAL:
- 4140 STEEL
- UNITS:
- ASSEMBLY
- COLOR/FINISH:
- STEEL
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- FEATURES:
- STANDARD CRANKSHAFT
- MODEL:
- 2-CYCLE
- STROKE LENGTH METRIC:
- 54.50 MM
- TYPE:
- OEM STROKE
$476.95 -
HOT RODS Crankshaft 4025
HOT RODS
$595.95If you're building a long-stroke engine for your ATV or sport quad, you need a crankshaft engineered to handle the demands of extended stroke geometry without sacrificing reliability. The HOT RODS Crankshaft 4025 arrives factory-assembled, trued to OEM...09210235- SKU:
- 09210235
- Availability:
- Ships Same Business Day
- Weight:
- 6.85 LBS
- DISPLACEMENT:
- 144 CC TO 150 CC
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- STROKE LENGTH METRIC:
- 58.30 MM
- COLOR/FINISH:
- STEEL
- FEATURES:
- STANDARD CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- 4140 STEEL
- UNITS:
- ASSEMBLY
- MODEL:
- 2-CYCLE
- TYPE:
- OEM STROKE
$595.95 -
HOT RODS Crankshaft 4029
HOT RODS
$662.95If you're serious about maximizing your ATV's displacement and power output, a long-stroke crankshaft is one of the most effective modifications available—and Hot Rods 4029 eliminates the guesswork with a factory-assembled, trued unit that's ready to...09210238- SKU:
- 09210238
- Availability:
- Ships Same Business Day
- Weight:
- 7.24 LBS
- COLOR/FINISH:
- STEEL
- MATERIAL:
- 4140 STEEL
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 54.80 MM
- UNITS:
- ASSEMBLY
- FEATURES:
- STANDARD CRANKSHAFT
- TYPE:
- OEM STROKE
- DISPLACEMENT:
- 250 CC
- MODEL:
- 4-CYCLE
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
$662.95 -
HOT RODS Crankshaft 4030
HOT RODS
$476.95If you're building a long-stroke engine for your ATV or sport quad, the HOT RODS Crankshaft 4030 eliminates the guesswork and machine work typically required for this conversion. This complete assembly arrives factory-assembled and trued to OEM...09210239- SKU:
- 09210239
- Availability:
- Ships Same Business Day
- Weight:
- 13.33 LBS
- COLOR/FINISH:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- ASSEMBLY
- DISPLACEMENT:
- 500 CC
- MODEL:
- 2-CYCLE
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- STROKE LENGTH METRIC:
- 79.00 MM
- MATERIAL:
- 4140 STEEL
- TYPE:
- OEM STROKE
- FEATURES:
- STANDARD CRANKSHAFT
$476.95Qty in Cart: 0Quantity:Price:$476.95Subtotal: -
HOT RODS Crankshaft 4046
HOT RODS
$515.95If you're running a long-stroke build on your ATV, a properly engineered crankshaft is non-negotiable—it's the foundation of reliability under sustained high RPM loads. The HOT RODS 4046 arrives factory-assembled and trued to OEM specifications,...09210240- SKU:
- 09210240
- Availability:
- Ships Same Business Day
- Weight:
- 6.95 LBS
- DISPLACEMENT:
- 200 CC
- FEATURES:
- STANDARD CRANKSHAFT
- MODEL:
- 2-CYCLE
- TYPE:
- OEM STROKE
- MATERIAL:
- 4140 STEEL
- UNITS:
- ASSEMBLY
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- COLOR/FINISH:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 59.90 MM
$515.95Qty in Cart: 0Quantity:Price:$515.95Subtotal: -
HOT RODS Crankshaft 4096
HOT RODS
$489.95If you're building a long-stroke engine for your high-performance ATV, the HOT RODS Crankshaft 4096 eliminates the guesswork and machine work typically required for displacement increases. This complete assembly arrives factory-assembled and trued to OEM...09210242- SKU:
- 09210242
- Availability:
- Ships Same Business Day
- Weight:
- 7.10 LBS
- MODEL:
- 4-CYCLE
- TYPE:
- OEM STROKE
- FEATURES:
- HEAVY DUTY CRANKSHAFT
- MATERIAL:
- 4140 STEEL
- UNITS:
- ASSEMBLY
- DISPLACEMENT:
- 250 CC
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- STROKE LENGTH METRIC:
- 53.60 MM
- COLOR/FINISH:
- STEEL
- RIDING STYLE:
- OFF-ROAD
$489.95 -
HOT RODS Crankshaft 4097
HOT RODS
$476.95If you're building a long-stroke engine for your ATV, the HOT RODS Crankshaft 4097 eliminates the guesswork and machine work typically required for high-displacement builds. Factory-assembled and trued to OEM specifications, this complete crankshaft...09210243- SKU:
- 09210243
- Availability:
- Ships Same Business Day
- Weight:
- 7.45 LBS
- FEATURES:
- STANDARD CRANKSHAFT
- MODEL:
- 4-CYCLE
- TYPE:
- OEM STROKE
- DISPLACEMENT:
- 250 CC
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- STROKE LENGTH METRIC:
- 53.80 MM
- MATERIAL:
- 4140 STEEL
- UNITS:
- ASSEMBLY
- COLOR/FINISH:
- STEEL
- RIDING STYLE:
- OFF-ROAD
$476.95 -
HOT RODS Crankshaft Assembly 4058
HOT RODS
$609.95If you're building a high-performance ATV engine or planning a long-stroke upgrade, the HOT RODS Crankshaft Assembly 4058 delivers factory-proven reliability without compromise. This complete assembly arrives factory-assembled and trued to OEM specs,...09210026- SKU:
- 09210026
- Availability:
- Ships Same Business Day
- Weight:
- 9.04 LBS
- COLOR/FINISH:
- STEEL
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- 4140 STEEL
- UNITS:
- ASSEMBLY
- DISPLACEMENT:
- 250 CC
- FEATURES:
- STANDARD CRANKSHAFT
- MODEL:
- 2-CYCLE
- STROKE LENGTH METRIC:
- 72.00 MM
- TYPE:
- OEM STROKE
$609.95 -
HOT RODS Crankshaft Assembly 4054
HOT RODS
$423.95If you're building a high-revving ATV engine or pushing your machine beyond stock limits, a quality crankshaft assembly is non-negotiable—it's the foundation of reliability under extreme conditions. The HOT RODS Crankshaft Assembly 4054 arrives...09210027- SKU:
- 09210027
- Availability:
- Ships Same Business Day
- Weight:
- 6.22 LBS
- COLOR/FINISH:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 54.60 MM
- DISPLACEMENT:
- 125 CC
- MATERIAL:
- 4140 STEEL
- UNITS:
- ASSEMBLY
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- FEATURES:
- STANDARD CRANKSHAFT
- MODEL:
- 2-CYCLE
- TYPE:
- OEM STROKE
$423.95 -
HOT RODS Crankshaft Assembly 4041
HOT RODS
$476.95If you're building a long-stroke engine for your ATV, the HOT RODS Crankshaft Assembly 4041 eliminates guesswork and machine work by delivering a factory-assembled, trued crankshaft ready for bolt-in installation. This complete assembly pairs proven...09210016- SKU:
- 09210016
- Availability:
- Ships Same Business Day
- Weight:
- 6.55 LBS
- DISPLACEMENT:
- 125 CC
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- FEATURES:
- STANDARD CRANKSHAFT
- STROKE LENGTH METRIC:
- 54.60 MM
- TYPE:
- OEM STROKE
- MODEL:
- 2-CYCLE
- COLOR/FINISH:
- STEEL
- MATERIAL:
- 4140 STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- ASSEMBLY
$476.95Qty in Cart: 0Quantity:Price:$476.95Subtotal: -
HOT RODS Crankshaft Assembly 4050
HOT RODS
$515.95If you're building a long-stroke engine for your ATV, you need a crankshaft assembly engineered to handle the demands of increased displacement and extended power delivery. The HOT RODS Crankshaft Assembly 4050 arrives factory-assembled, trued to OEM...09210017- SKU:
- 09210017
- Availability:
- Ships Same Business Day
- Weight:
- 8.63 LBS
- MODEL:
- 4-CYCLE
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- DISPLACEMENT:
- 450 CC
- FEATURES:
- HEAVY DUTY CRANKSHAFT
- MATERIAL:
- 4140 STEEL
- STROKE LENGTH METRIC:
- 63.40 MM
- TYPE:
- OEM STROKE
- COLOR/FINISH:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- ASSEMBLY
$515.95 -
HOT RODS Crankshaft 4081
HOT RODS
$595.95If you're building a long-stroke engine for your ATV, the HOT RODS Crankshaft 4081 eliminates the guesswork and machine work typically required for displacement increases. This complete assembly arrives factory-assembled and trued to OEM specifications,...09210136- SKU:
- 09210136
- Availability:
- Ships Same Business Day
- Weight:
- 7.26 LBS
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- COLOR/FINISH:
- STEEL
- FEATURES:
- STANDARD CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- OEM STROKE
- MODEL:
- 4-CYCLE
- DISPLACEMENT:
- 250 CC
- MATERIAL:
- 4140 STEEL
- STROKE LENGTH METRIC:
- 53.60 MM
- UNITS:
- ASSEMBLY
$595.95 -
HOT RODS Crankshaft 4022
HOT RODS
$609.95The HOT RODS Crankshaft 4022 is factory-assembled and trued to OEM specifications, delivering reliable performance whether you're rebuilding a stock engine or pushing it to the limit. This complete crankshaft assembly arrives ready for installation,...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
$609.95 -
HOT RODS Bottom End Kit CBK0209
HOT RODS
$494.95A 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 tired engine or...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
$494.95Qty in Cart: 0Quantity:Price:$494.95Subtotal: -
HOT RODS Bottom End Kit CBK0207
HOT RODS
$531.95A complete crankshaft installation demands precision and reliability—this kit eliminates guesswork by bundling everything you need in one package. Whether you're building a stroker engine or completing a full rebuild, the HOT RODS Bottom End Kit CBK0207...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
$531.95
