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
-
Wiseco Crankshaft KTM 65 SX 2003-2008 WPC161A
WISECO
$329.95If you're rebuilding a KTM 65 SX or pushing your engine to its limits, the Wiseco WPC161A crankshaft kit delivers the precision and durability needed for reliable high-RPM operation. This complete bottom-end solution eliminates the guesswork of sourcing...09210547- SKU:
- 09210547
- Availability:
- Ships Same Business Day
- Weight:
- 6.10 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- CRANKSHAFT KIT
- STROKE LENGTH METRIC:
- 40.00 MM
$329.95Qty in Cart: 0Quantity:Price:$329.95Subtotal: -
HOT RODS Crankshaft Kit CBK0001
HOT RODS
$305.95If you're building a high-performance engine or rebuilding a worn crankshaft assembly, the HOT RODS Crankshaft Kit CBK0001 delivers factory-spec reliability with measurable performance gains over OEM components. This complete, pre-assembled unit arrives...09210260- SKU:
- 09210260
- Availability:
- Ships Same Business Day
- Weight:
- 7.10 LBS
- TYPE:
- OEM
- PRODUCT NAME:
- CRANKSHAFT KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$305.95 -
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 reliable power gains. This factory-assembled unit arrives...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 applications. This complete assembly arrives factory-assembled and...09210265- SKU:
- 09210265
- Availability:
- Ships Same Business Day
- Weight:
- 12.35 LBS
- PRODUCT NAME:
- CRANKSHAFT KIT
- TYPE:
- OEM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$795.95 -
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 reliability. This complete, factory-assembled unit arrives...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 arrives factory-assembled and trued to OEM...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 factory-assembled unit arrives trued to OEM specifications...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 factory-assembled precision with double-forged construction and...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 OEM performance specs while delivering the durability...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 factory-assembled, precision-trued crankshaft paired with...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 engineered for consistent performance and longevity...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 bottom-end components with precision-engineered parts...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 factory-assembled and precision-trued to OEM specifications, so...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, factory-assembled solution that restores your bike to OEM...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 or upgrading to a precision-balanced assembly, this...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. The WSM 010-1018-01WSM is manufactured to meet or...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 Assembly 010-1019-01WSM is engineered to OEM...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 components trued to factory specifications, ensuring...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
