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
-
On Sale
PROX PRO-X Crank Seal Kit 42.4288
PROX
MSRP: $9.95Now: $8.00Was: $9.95A compromised crank seal can silently undermine engine reliability, leading to oil leaks, contamination, and catastrophic failure during critical race moments or long-term ownership. The PROX PRO-X...094487- SKU:
- 094487
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
MSRP: $9.95Now: $8.00Was: $9.95Qty in Cart: 0Quantity:Price:MSRP: $9.95Now: $8.00Was: $9.95Subtotal: -
Wiseco Crankshaft with Bearing and Gasket for 2004-2009 Honda CRF250R WPC159
WISECO
$532.95A worn or damaged crankshaft compromises engine reliability and performance—especially in high-RPM racing applications where precision is non-negotiable. The Wiseco WPC159 crankshaft assembly...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
$532.95 -
Wiseco Crankshaft Assembly for 2004-2007 Kawasaki KX250F WPC144
WISECO
$621.95A quality crankshaft assembly is the foundation of engine reliability and performance—without it, you're risking catastrophic failure and lost race time. The Wiseco WPC144 delivers factory-assembled...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
$621.95Qty in Cart: 0Quantity:Price:$621.95Subtotal: -
Wiseco Crankshaft Assembly with Bearings and Gasket for 1995-2005 Kawasaki KX100 WPC119
WISECO
$344.95A crankshaft is the foundation of your engine's reliability and performance—a worn or damaged unit will rob you of power and risk catastrophic failure. The Wiseco WPC119 is factory-assembled and...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
$344.95Qty in Cart: 0Quantity:Price:$344.95Subtotal: -
Wiseco Crankshaft Kit for Honda CR250R 1992-2001 WPC101
WISECO
$466.95The Wiseco WPC101 crankshaft kit is engineered for CR250R racers who demand reliability under extreme combustion loads and sustained high RPM operation. This factory-assembled unit arrives...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
$466.95Qty in Cart: 0Quantity:Price:$466.95Subtotal: -
Wiseco Crankshaft Kit for Kawasaki KX65 2000-2005 and Suzuki RM65 2003-2005 WPC117
WISECO
$332.95A worn or damaged crankshaft limits your engine's ability to deliver consistent power and reliability. The Wiseco Crankshaft Kit gives you a factory-assembled, precision-engineered solution that...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
$332.95 -
Wiseco Crankshaft Assembly with Bearings and Gasket for 2003-2004 Honda CR85R WPC115
WISECO
$314.95If you're rebuilding a 2003-2004 Honda CR85R, the crankshaft is the foundation of your engine's reliability and performance. The Wiseco Crankshaft Assembly eliminates the guesswork by delivering a...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
$314.95Qty in Cart: 0Quantity:Price:$314.95Subtotal: -
Wiseco Crankshaft Kit for 2001-2003 Suzuki RM125 WPC121
WISECO
$432.95If you're rebuilding a 2001-2003 RM125 or pushing your existing bottom-end to its limits, a quality crankshaft kit isn't optional—it's essential. The Wiseco WPC121 eliminates the guesswork of...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
$432.95 -
Wiseco Crankshaft Assembly for 2001-2004 Yamaha YZ125 WPC125
WISECO
$410.95A worn or damaged crankshaft directly compromises engine reliability and power delivery on your YZ125. This Wiseco assembly eliminates guesswork with factory-assembled, precision-trued components...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
$410.95Qty in Cart: 0Quantity:Price:$410.95Subtotal: -
Wiseco Crankshaft Assembly with Bearing and Gasket for Yamaha YZ250 2003-2025 WPC134
WISECO
$466.95A worn or damaged crankshaft assembly compromises engine reliability, throttle response, and overall power delivery—especially critical in high-RPM racing applications. The Wiseco WPC134 is a...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
$466.95Qty in Cart: 0Quantity:Price:$466.95Subtotal: -
Wiseco Crankshaft Assembly with Bearings and Gasket for 2003-2012 Yamaha YZ250F WPC140
WISECO
$577.95If you're rebuilding a YZ250F bottom end, you need a crankshaft assembly that can handle the demands of consistent high-RPM operation without compromise. The Wiseco WPC140 delivers factory-grade...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
$577.95Qty in Cart: 0Quantity:Price:$577.95Subtotal: -
Wiseco Yamaha YZ80 1993-2001 Crankshaft Kit WPC122
WISECO
$343.95A worn or failing crankshaft will tank your YZ80's reliability and power delivery—this Wiseco kit gives you a factory-assembled, precision-engineered replacement that meets OEM specifications and...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
$343.95 -
Wiseco Crankshaft Assembly with Bearings and Gasket for 2001-2002 Yamaha YZ250 WPC127
WISECO
$477.95A worn or damaged crankshaft will cripple your YZ250's power delivery and reliability on the track. The Wiseco WPC127 assembly delivers factory-spec precision with OEM-matched tolerances, so you get...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
$477.95 -
Wiseco Crankshaft Assembly with Bearings and Gasket for 1999-2000 Yamaha YZ250 WPC126
WISECO
$477.95A worn or damaged crankshaft compromises your YZ250's bottom-end reliability and power delivery—especially critical if you're pushing hard at the track or trail. This Wiseco complete assembly...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
$477.95Qty in Cart: 0Quantity:Price:$477.95Subtotal: -
Wiseco Crankshaft Kit for 2006-2009 Yamaha YZ450F WPC151
WISECO
$624.95A crankshaft is the foundation of engine reliability and performance—when it fails, your entire engine fails. The Wiseco Crankshaft Kit for 2006-2009 Yamaha YZ450F delivers factory-matched precision...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
$624.95Qty in Cart: 0Quantity:Price:$624.95Subtotal: -
Wiseco Crankshaft Kit with Gasket 2001-2015 KTM 125 SX WPC153
WISECO
$621.95A crankshaft failure leaves you sidelined. The Wiseco WPC153 kit delivers a complete bottom-end solution—crankshaft, bearings, gaskets, and seals all precision-assembled to OEM specs—so you can...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
$621.95 -
WSM Crankshaft Assembly 010-1028WSM
WSM
$908.90A quality crankshaft assembly is the backbone of reliable engine performance, directly impacting power delivery, durability, and overall engine longevity. The WSM 010-1028WSM is precision-engineered...09210483- SKU:
- 09210483
- Availability:
- Ships Same Business Day
- Weight:
- 28.95 LBS
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- MATERIAL:
- STEEL
- UNITS:
- KIT
- RIDING STYLE:
- WATERCRAFT
$908.90 -
WSM Crankshaft Assembly 010-1028-01WSM
WSM
$1,165.75A quality crankshaft is the backbone of engine reliability and performance—if yours is worn, damaged, or you're rebuilding from the ground up, this WSM assembly delivers the precision you need...09210484- 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 -
WSM Crankshaft Assembly 010-1060WSM
WSM
$802.26A crankshaft assembly is the backbone of your engine's bottom end—it converts reciprocating piston motion into rotational power, making its precision and durability absolutely critical to engine...09210485- SKU:
- 09210485
- Availability:
- Ships Same Business Day
- Weight:
- 24.10 LBS
- PRODUCT NAME:
- CRANKSHAFT
- RIDING STYLE:
- WATERCRAFT
- MATERIAL:
- STEEL
- UNITS:
- EACH
$802.26 -
WSM Crankshaft Assembly 010-1026WSM
WSM
$851.45A reliable crankshaft assembly is the foundation of engine durability and consistent performance—especially under high RPM and load conditions. The WSM Crankshaft Assembly 010-1026WSM delivers...09210231- SKU:
- 09210231
- Availability:
- Ships Same Business Day
- Weight:
- 31.16 LBS
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- MATERIAL:
- STEEL
- UNITS:
- KIT
- RIDING STYLE:
- WATERCRAFT
$851.45
