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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PROX PRO-X Crank Seal Kit 42.4105
PROX
$9.95OEM quality, All seals necessary for complete crank rebuild included094481- SKU:
- 094481
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
$9.95 -
PROX PRO-X Crank Seal Kit 42.4208
PROX
$19.95OEM quality, All seals necessary for complete crank rebuild included094484- SKU:
- 094484
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
$19.95 -
PROX PRO-X Crank Seal Kit 42.4288
PROX
$9.95OEM quality, All seals necessary for complete crank rebuild included094487- SKU:
- 094487
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
$9.95 -
Wiseco Crankshaft with Bearing and Gasket for 2004-2009 Honda CRF250R WPC159
WISECO
$524.95Upgrade your engine's performance with the WISECO Crankshaft, expertly crafted for durability and precision. This comprehensive kit includes everything you need for a complete bottom end rebuild, ensuring optimal performance and reliability. Factory...09210140- SKU:
- 09210140
- Availability:
- Ships Same Business Day
- Weight:
- 10.06 LBS
- FEATURES:
- INCLUDES BEARING AND GASKET
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- STROKE LENGTH METRIC:
- 52.20 MM
- TYPE:
- BOTTOM END
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$524.95 -
Wiseco Crankshaft Assembly for 2004-2007 Kawasaki KX250F WPC144
WISECO
$574.95Enhance your engine's performance with the WISECO Crankshaft Assembly, featuring a complete set of premium components designed for durability and efficiency. This assembly includes a top-end bearing, high-quality main bearings, and a comprehensive gasket...09210141- SKU:
- 09210141
- Availability:
- Ships Same Business Day
- Weight:
- 10.10 LBS
- FEATURES:
- INCLUDES BEARING AND GASKET
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 53.60 MM
- TYPE:
- BOTTOM END
- UNITS:
- KIT
$574.95 -
Wiseco Crankshaft Assembly with Bearings and Gasket for 1995-2005 Kawasaki KX100 WPC119
WISECO
$344.95Elevate your engine's performance with the WISECO Crankshaft, expertly designed to meet OEM specifications. This comprehensive kit includes a top-end bearing, premium main bearings, and a complete bottom-end gasket set, ensuring you have everything...09210089- SKU:
- 09210089
- Availability:
- Ships Same Business Day
- Weight:
- 6.31 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- BOTTOM END
- UNITS:
- KIT
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- FEATURES:
- INCLUDES BEARING AND GASKET
- STROKE LENGTH METRIC:
- 45.80 MM
$344.95 -
Wiseco Crankshaft Kit for Honda CR250R 1992-2001 WPC101
WISECO
$459.95Upgrade your engine performance with the WISECO Crankshaft WPC101, designed for precision and reliability. This comprehensive kit includes a top-end bearing, premium main bearings, and a complete bottom-end gasket set, ensuring you have everything needed...09210090- SKU:
- 09210090
- Availability:
- Ships Same Business Day
- Weight:
- 12.72 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- BOTTOM END
- UNITS:
- KIT
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- FEATURES:
- INCLUDES BEARING AND GASKET
- STROKE LENGTH METRIC:
- 72.00 MM
$459.95 -
Wiseco Crankshaft Kit for Kawasaki KX65 2000-2005 and Suzuki RM65 2003-2005 WPC117
WISECO
$339.95Upgrade your engine's performance with the WISECO Crankshaft, meticulously engineered for reliability and efficiency. This comprehensive kit includes everything you need for a complete overhaul, ensuring optimal functionality and longevity of your engine...09210093- SKU:
- 09210093
- Availability:
- Ships Same Business Day
- Weight:
- 5.28 LBS
- FEATURES:
- INCLUDES BEARING AND GASKET
- MATERIAL:
- STEEL
- TYPE:
- BOTTOM END
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 41.60 MM
- UNITS:
- KIT
$339.95 -
Wiseco Crankshaft Assembly with Bearings and Gasket for 2003-2004 Honda CR85R WPC115
WISECO
$314.95Experience unparalleled performance with the WISECO Crankshaft Assembly, designed for optimal efficiency and durability. This complete kit includes a precision-engineered crankshaft, top-end bearing, premium main bearings, and a comprehensive bottom-end...09210094- SKU:
- 09210094
- Availability:
- Ships Same Business Day
- Weight:
- 6.70 LBS
- FEATURES:
- INCLUDES BEARING AND GASKET
- MATERIAL:
- STEEL
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- BOTTOM END
- STROKE LENGTH METRIC:
- 47.80 MM
$314.95 -
Wiseco Crankshaft Kit for 2001-2003 Suzuki RM125 WPC121
WISECO
$399.95This WISECO crankshaft kit is engineered for optimal performance and reliability, featuring a precision-assembled crankshaft, top-end bearings, and a comprehensive bottom-end gasket set. Designed to meet OEM specifications, this kit simplifies your...09210095- SKU:
- 09210095
- Availability:
- Ships Same Business Day
- Weight:
- 9.23 LBS
- FEATURES:
- INCLUDES BEARING AND GASKET
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- TYPE:
- BOTTOM END
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 54.50 MM
- UNITS:
- KIT
$399.95 -
Wiseco Crankshaft Assembly for 2001-2004 Yamaha YZ125 WPC125
WISECO
$384.95Upgrade your engine's performance with the WISECO Crankshaft, meticulously engineered for durability and efficiency. This comprehensive kit includes everything you need for a complete rebuild, ensuring optimal performance and reliability. Includes...09210096- SKU:
- 09210096
- Availability:
- Ships Same Business Day
- Weight:
- 8.02 LBS
- STROKE LENGTH METRIC:
- 54.50 MM
- FEATURES:
- INCLUDES BEARING AND GASKET
- TYPE:
- BOTTOM END
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$384.95 -
Wiseco Crankshaft Assembly with Bearing and Gasket for Yamaha YZ250 2003-2025 WPC134
WISECO
$434.95Upgrade your engine's performance with the WISECO Crankshaft Assembly, meticulously engineered for optimal efficiency and durability. This complete kit includes a top-end bearing, premium main bearings, and a comprehensive bottom-end gasket set, ensuring...09210097- SKU:
- 09210097
- Availability:
- Ships Same Business Day
- Weight:
- 12.16 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
$434.95 -
Wiseco Crankshaft Assembly with Bearings and Gasket for 2003-2012 Yamaha YZ250F WPC140
WISECO
$554.95Upgrade your engine's performance with the WISECO Crankshaft, designed for precision and durability. This comprehensive kit includes everything you need for a complete bottom end rebuild, ensuring optimal functionality and longevity. Factory...09210098- SKU:
- 09210098
- Availability:
- Ships Same Business Day
- Weight:
- 8.65 LBS
- STROKE LENGTH METRIC:
- 53.60 MM
- TYPE:
- BOTTOM END
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- FEATURES:
- INCLUDES BEARING AND GASKET
- MATERIAL:
- STEEL
$554.95 -
Wiseco Yamaha YZ80 1993-2001 Crankshaft Kit WPC122
WISECO
$344.95Enhance your engine's performance with the WISECO Crankshaft WPC122, featuring a comprehensive set of premium components designed for reliability and efficiency. This assembly includes high-quality bearings and a complete gasket set, ensuring a seamless...09210101- SKU:
- 09210101
- Availability:
- Ships Same Business Day
- Weight:
- 6.24 LBS
- FEATURES:
- INCLUDES BEARING AND GASKET
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 47.80 MM
- TYPE:
- BOTTOM END
- UNITS:
- KIT
$344.95 -
Wiseco Crankshaft Assembly with Bearings and Gasket for 2001-2002 Yamaha YZ250 WPC127
WISECO
$464.95Elevate your engine's performance with the WISECO Crankshaft, expertly engineered for reliability and precision. This comprehensive kit includes top-end bearings, premium main bearings, and a complete bottom-end gasket set, ensuring you have everything...09210102- SKU:
- 09210102
- Availability:
- Ships Same Business Day
- Weight:
- 12.30 LBS
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- FEATURES:
- INCLUDES BEARING AND GASKET
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 72.00 MM
- TYPE:
- BOTTOM END
- UNITS:
- KIT
$464.95 -
Wiseco Crankshaft Assembly with Bearings and Gasket for 1999-2000 Yamaha YZ250 WPC126
WISECO
$464.95Upgrade your engine's performance with the WISECO Crankshaft, meticulously engineered for optimal efficiency and durability. This comprehensive kit includes everything you need for a complete rebuild, ensuring a seamless installation and enhanced...09210104- SKU:
- 09210104
- Availability:
- Ships Same Business Day
- Weight:
- 12.18 LBS
- STROKE LENGTH METRIC:
- 72.00 MM
- FEATURES:
- INCLUDES BEARING AND GASKET
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- BOTTOM END
- UNITS:
- KIT
$464.95 -
Wiseco Crankshaft Kit for 2006-2009 Yamaha YZ450F WPC151
WISECO
$624.95Upgrade your engine's performance with the WISECO Crankshaft Kit, designed for precision and durability. This comprehensive kit includes everything you need for a seamless installation, featuring factory-assembled crankshafts that meet OEM specifications...09210432- SKU:
- 09210432
- Availability:
- Ships Same Business Day
- Weight:
- 12.27 LBS
- PRODUCT NAME:
- CRANKSHAFT KIT
- FEATURES:
- INCLUDES BEARING AND GASKET
- TYPE:
- BOTTOM END
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 63.40 MM
- UNITS:
- KIT
$624.95 -
Wiseco Crankshaft Kit with Gasket 2001-2015 KTM 125 SX WPC153
WISECO
$569.95The WISECO Crankshaft Kit with Gasket WPC153 is engineered for high performance and reliability. This comprehensive kit includes everything you need for a complete overhaul, ensuring your engine runs smoothly and efficiently. With precision manufacturing...09210434- SKU:
- 09210434
- Availability:
- Ships Same Business Day
- Weight:
- 9.97 LBS
- FEATURES:
- INCLUDES BEARING AND GASKET
- PRODUCT NAME:
- CRANKSHAFT KIT
- TYPE:
- BOTTOM END
- MATERIAL:
- STEEL
- STROKE LENGTH METRIC:
- 54.50 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$569.95 -
WSM Crankshaft Assembly 010-1028WSM
WSM
$865.62Complete crankshaft assembly with connecting rod, Will meet or exceed OEM performance, Trued to OEM specifications, Multi-cylinder applications include main bearings, Rebuildable, Ready for installation09210483- SKU:
- 09210483
- Availability:
- Ships Same Business Day
- Weight:
- 28.95 LBS
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- MATERIAL:
- STEEL
- UNITS:
- KIT
- RIDING STYLE:
- WATERCRAFT
$865.62 -
WSM Crankshaft Assembly 010-1028-01WSM
WSM
$1,165.75Complete crankshaft assembly with connecting rod, Will meet or exceed OEM performance, Trued to OEM specifications, Multi-cylinder applications include main bearings, Rebuildable, Ready for installation09210484- SKU:
- 09210484
- Availability:
- Ships Same Business Day
- Weight:
- 42.80 LBS
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- MATERIAL:
- STEEL
- RIDING STYLE:
- WATERCRAFT
- UNITS:
- KIT
$1,165.75
