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
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HOT RODS Crankshaft Kit CBK0004
HOT RODS
$741.95If you're building a high-performance engine or restoring a classic with increased displacement, the HOT RODS Crankshaft Kit CBK0004 delivers the stroke length and structural integrity needed for...09210263- SKU:
- 09210263
- Availability:
- Ships Same Business Day
- Weight:
- 9.47 LBS
- TYPE:
- OEM
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- CRANKSHAFT KIT
- UNITS:
- KIT
$741.95Qty in Cart: 0Quantity:Price:$741.95Subtotal: -
HOT RODS Crankshaft Kit CBK0006
HOT RODS
$795.95The HOT RODS Crankshaft Kit CBK0006 delivers factory-matched reliability with performance that meets or exceeds OEM specifications, making it ideal for both stock rebuilds and performance...09210265- SKU:
- 09210265
- Availability:
- Ships Same Business Day
- Weight:
- 12.35 LBS
- PRODUCT NAME:
- CRANKSHAFT KIT
- TYPE:
- OEM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$795.95Qty in Cart: 0Quantity:Price:$795.95Subtotal: -
HOT RODS Crankshaft Assembly 4035
HOT RODS
$417.95A high-performance crankshaft assembly is the heart of any rebuilt or modified engine—and the HOT RODS 4035 delivers the durability and precision you need to push power limits without sacrificing...H124- SKU:
- H124
- Availability:
- Ships Same Business Day
- Weight:
- 6.30 LBS
- COLOR/FINISH:
- STEEL
- DISPLACEMENT:
- 125 CC
- MATERIAL:
- 4140 STEEL
- UNITS:
- ASSEMBLY
- FEATURES:
- STANDARD CRANKSHAFT
- MODEL:
- 2-CYCLE
- TYPE:
- OEM STROKE
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 54.60 MM
$417.95Qty in Cart: 0Quantity:Price:$417.95Subtotal: -
HOT RODS Crankshaft Kit 4416
HOT RODS
$489.95If you're building a long-stroke engine for your ATV, the HOT RODS Crankshaft Kit 4416 eliminates the guesswork and machine work typically required for displacement increases. This complete assembly...09210516- SKU:
- 09210516
- Availability:
- Ships Same Business Day
- Weight:
- 6.95 LBS
- COLOR/FINISH:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- DISPLACEMENT:
- 250 CC
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- STROKE LENGTH METRIC:
- 53.60 MM
- MATERIAL:
- 4140 STEEL
- UNITS:
- ASSEMBLY
- FEATURES:
- STANDARD CRANKSHAFT
- MODEL:
- 4-CYCLE
- TYPE:
- OEM STROKE
$489.95 -
HOT RODS Crankshaft 4093
HOT RODS
$465.95If you're building a long-stroke engine for your ATV, the HOT RODS Crankshaft 4093 eliminates the guesswork and machine work typically required to achieve reliable, high-performance results. This...09210213- SKU:
- 09210213
- Availability:
- Ships Same Business Day
- Weight:
- 9.94 LBS
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- MODEL:
- 4-CYCLE
- DISPLACEMENT:
- 450 CC
- FEATURES:
- STANDARD CRANKSHAFT
- TYPE:
- OEM STROKE
- COLOR/FINISH:
- STEEL
- MATERIAL:
- 4140 STEEL
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 62.10 MM
- UNITS:
- ASSEMBLY
$465.95Qty in Cart: 0Quantity:Price:$465.95Subtotal: -
Wiseco Crankshaft Kit for 1992-2001 Kawasaki KX250 WPC128B
WISECO
$510.95A crankshaft is the backbone of your KX250's bottom end—when you're pushing peak RPMs on the track or trail, you need a unit that won't compromise under load. The Wiseco WPC128B delivers...09210109- SKU:
- 09210109
- Availability:
- Ships Same Business Day
- Weight:
- 12.51 LBS
- TYPE:
- BOTTOM END
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- FEATURES:
- INCLUDES BEARING AND GASKET
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
$510.95Qty in Cart: 0Quantity:Price:$510.95Subtotal: -
Wiseco Crankshaft Assembly with Bearings and Gasket for 2002-2018 Yamaha YZ85 WPC123
WISECO
$321.95A crankshaft assembly is the heart of your engine's bottom end—when it fails, your bike is done. This Wiseco kit gives you a factory-assembled, precision-trued replacement that restores your YZ85 to...09210099- SKU:
- 09210099
- Availability:
- Ships Same Business Day
- Weight:
- 6.27 LBS
- STROKE LENGTH METRIC:
- 47.80 MM
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- BOTTOM END
- FEATURES:
- INCLUDES BEARING AND GASKET
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
$321.95 -
Wiseco Crankshaft Assembly with Bearing and Gasket for Yamaha YZ125 1998-2000 WPC124
WISECO
$421.95If you're rebuilding a YZ125 two-stroke or pushing your engine to its limits, a worn or damaged crankshaft will quickly become your bottleneck. The Wiseco WPC124 eliminates guesswork with a...09210100- SKU:
- 09210100
- Availability:
- Ships Same Business Day
- Weight:
- 8.06 LBS
- FEATURES:
- INCLUDES BEARING AND GASKET
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 54.50 MM
- UNITS:
- KIT
- TYPE:
- BOTTOM END
$421.95 -
Wiseco Crankshaft Kit for Kawasaki KX60 1985-2003 and Suzuki RM60 2003 WPC130
WISECO
$339.95The stock crankshaft in your KX60 or RM60 will eventually wear, compromising compression, power delivery, and engine reliability. The Wiseco WPC130 addresses this with a complete bottom-end solution...09210103- SKU:
- 09210103
- Availability:
- Ships Same Business Day
- Weight:
- 5.92 LBS
- STROKE LENGTH METRIC:
- 41.60 MM
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- FEATURES:
- INCLUDES BEARING AND GASKET
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- BOTTOM END
- UNITS:
- KIT
$339.95Qty in Cart: 0Quantity:Price:$339.95Subtotal: -
Wiseco Crankshaft Kit for 2002-2004 Honda CR250R WPC132
WISECO
$459.95If you're running a 2002-2004 Honda CR250R at the edge of its limits, your factory crankshaft assembly is the weak link holding back your potential. The Wiseco WPC132 kit replaces worn or damaged...09210105- SKU:
- 09210105
- Availability:
- Ships Same Business Day
- Weight:
- 12.55 LBS
- STROKE LENGTH METRIC:
- 72.00 MM
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- UNITS:
- KIT
- FEATURES:
- INCLUDES BEARING AND GASKET
- TYPE:
- BOTTOM END
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
$459.95Qty in Cart: 0Quantity:Price:$459.95Subtotal: -
Wiseco Crankshaft Assembly for 1990-2002 Honda CR125R WPC116A
WISECO
$359.95If you're rebuilding a CR125R or pushing your existing engine toward higher RPM performance, crankshaft quality directly impacts your reliability and power output. The Wiseco WPC116A is...09210107- SKU:
- 09210107
- Availability:
- Ships Same Business Day
- Weight:
- 8.26 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- BOTTOM END
- FEATURES:
- INCLUDES BEARING AND GASKET
- MATERIAL:
- STEEL
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
$359.95Qty in Cart: 0Quantity:Price:$359.95Subtotal: -
Wiseco Honda CRF150R 2007-2024 Crankshaft Assembly WPC149
WISECO
$477.95A worn or damaged crankshaft compromises engine reliability and performance—especially in a high-revving four-stroke like the CRF150R. The Wiseco WPC149 assembly gives you a complete,...09210148- SKU:
- 09210148
- Availability:
- Ships Same Business Day
- Weight:
- 7.11 LBS
- STROKE LENGTH METRIC:
- 43.70 MM
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- BOTTOM END
- FEATURES:
- INCLUDES BEARING AND GASKET
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
$477.95Qty in Cart: 0Quantity:Price:$477.95Subtotal: -
WSM Crankshaft Assembly 010-1061WSM
WSM
$764.06A reliable crankshaft assembly is the foundation of engine durability and performance—this WSM unit delivers OEM-equivalent specifications without compromise. Whether you're rebuilding a tired engine...09210486- SKU:
- 09210486
- Availability:
- Ships Same Business Day
- Weight:
- 24.30 LBS
- PRODUCT NAME:
- CRANKSHAFT
- RIDING STYLE:
- WATERCRAFT
- MATERIAL:
- STEEL
- UNITS:
- EACH
$764.06Qty in Cart: 0Quantity:Price:$764.06Subtotal: -
WSM Crankshaft Assembly 010-1018-01WSM
WSM
$810.90A crankshaft assembly is the heart of your engine's power delivery—it converts reciprocating motion into rotational force with precision that directly impacts horsepower, reliability, and longevity...09210226- SKU:
- 09210226
- Availability:
- Ships Same Business Day
- Weight:
- 25.30 LBS
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- MATERIAL:
- STEEL
- RIDING STYLE:
- WATERCRAFT
- UNITS:
- KIT
$810.90Qty in Cart: 0Quantity:Price:$810.90Subtotal: -
WSM Crankshaft Assembly 010-1019-01WSM
WSM
$803.20A quality crankshaft assembly is the foundation of engine reliability and performance—any compromise here directly impacts power delivery, longevity, and overall engine stability. The WSM Crankshaft...09210228- SKU:
- 09210228
- Availability:
- Ships Same Business Day
- Weight:
- 28.59 LBS
- MATERIAL:
- STEEL
- UNITS:
- KIT
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- RIDING STYLE:
- WATERCRAFT
$803.20 -
WSM Crankshaft Assembly 010-1025WSM
WSM
$754.95A reliable crankshaft assembly is the backbone of any high-performance engine—it's where combustion force converts to rotational power. The WSM 010-1025WSM delivers OEM-equivalent performance with...09210229- SKU:
- 09210229
- Availability:
- Ships Same Business Day
- Weight:
- 20.60 LBS
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- RIDING STYLE:
- WATERCRAFT
- MATERIAL:
- STEEL
- UNITS:
- KIT
$754.95
