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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MOOSE RACING Crankcase Bearing and Seal Kit 24-1006
MOOSE RACING
$62.95Your crankshaft is the heart of your engine—and it demands precision bearings that won't fail under high RPM stress. The MOOSE RACING Crankcase Bearing and Seal Kit 24-1006 delivers OEM-quality components engineered to reduce friction, minimize wear, and...A241006- SKU:
- A241006
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- BEARING KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CRANK
$62.95 -
MOOSE RACING Crankcase Bearing and Seal Kit 24-1026
MOOSE RACING
$85.95A quality crankcase bearing and seal kit is non-negotiable for reliable engine performance, whether you're rebuilding after hard racing or performing preventive maintenance. The MOOSE RACING 24-1026 delivers precision-engineered bearings that maintain...A241026- SKU:
- A241026
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- CRANK
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- PRODUCT NAME:
- BEARING KIT
$85.95 -
MOOSE RACING Crankcase Bearing and Seal Kit 24-1028
MOOSE RACING
$94.95A crankshaft bearing kit is essential maintenance for preserving engine longevity and reliable performance. Worn or damaged crank bearings introduce play into your crankshaft, leading to excessive vibration, power loss, and catastrophic engine failure...A241028- SKU:
- A241028
- Availability:
- Ships Same Business Day
- Weight:
- 1.40 LBS
- PRODUCT NAME:
- BEARING KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CRANK
- UNITS:
- KIT
$94.95 -
MOOSE RACING Crankcase Bearing and Seal Kit 24-1010
MOOSE RACING
$85.95A healthy crankshaft is the foundation of reliable engine performance, and worn bearings or seals will cost you power, efficiency, and ultimately, engine life. The MOOSE RACING Crankcase Bearing and Seal Kit 24-1010 delivers OEM-quality precision...A241010- SKU:
- A241010
- Availability:
- Ships Same Business Day
- Weight:
- 1.35 LBS
- PRODUCT NAME:
- BEARING KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- CRANK
$85.95 -
MOOSE RACING Crankcase Bearing and Seal Kit 24-1011
MOOSE RACING
$109.95A crankshaft bearing failure mid-race isn't just costly—it's catastrophic. The MOOSE RACING 24-1011 Crankcase Bearing and Seal Kit delivers OEM-quality precision bearings engineered to handle sustained high RPM loads while maintaining tight tolerances...A241011- SKU:
- A241011
- Availability:
- Ships Same Business Day
- Weight:
- 1.65 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- CRANK
- PRODUCT NAME:
- BEARING KIT
$109.95 -
MOOSE RACING Crankcase Bearing and Seal Kit 24-1016
MOOSE RACING
$92.95A worn crankshaft bearing or damaged seal will compromise engine reliability and performance—leading to increased friction, oil leakage, and potential catastrophic failure. The MOOSE RACING Crankcase Bearing and Seal Kit 24-1016 delivers OEM-quality...A241016- SKU:
- A241016
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- PRODUCT NAME:
- BEARING KIT
- TYPE:
- CRANK
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$92.95 -
MOOSE RACING Crankcase Bearing and Seal Kit 24-1021
MOOSE RACING
$103.95A worn or failing crankshaft bearing kit compromises engine reliability and performance—especially in high-RPM 2-stroke applications where precision matters. The MOOSE RACING 24-1021 delivers OEM-quality bearings with fluorocarbon seals engineered to...A241021- SKU:
- A241021
- Availability:
- Ships Same Business Day
- Weight:
- 1.35 LBS
- PRODUCT NAME:
- BEARING KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- CRANK
$103.95 -
MOOSE RACING Crankcase Bearing and Seal Kit 24-1024
MOOSE RACING
$75.95A worn or failing crankcase bearing directly compromises engine reliability and performance—especially critical in high-RPM 2-stroke applications where precision clearances are non-negotiable. The MOOSE RACING 24-1024 kit delivers OEM-quality bearings...A241024- SKU:
- A241024
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- BEARING KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CRANK
$75.95 -
MOOSE RACING Crankcase Bearing and Seal Kit 24-1025
MOOSE RACING
$76.95A failing crankshaft bearing will quickly cascade into catastrophic engine failure—and there's no coming back from that. The MOOSE RACING 24-1025 kit delivers precision-engineered bearings with a fluorocarbon-sealed design that minimizes dry start...A241025- SKU:
- A241025
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- TYPE:
- CRANK
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- BEARING KIT
$76.95 -
WSM Rotary Valve Gear 010-450
WSM
$45.26If your Sea-Doo's rotary valve isn't operating at peak efficiency, power delivery and throttle response suffer—and so does your watercraft's overall performance. The WSM Rotary Valve Gear 010-450 is a direct replacement engineered to restore precise...010450- SKU:
- 010450
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- UNITS:
- EACH
- PRODUCT NAME:
- GEAR
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- ROTARY VALVE
$45.26 -
WSM Rotary Valve Shaft 010-455
WSM
$86.94The WSM Rotary Valve Shaft 010-455 is essential for maintaining precise intake timing and fuel delivery in your Sea-Doo engine. A worn or damaged rotary valve shaft compromises performance and can lead to costly engine damage if left unaddressed. This...010455- SKU:
- 010455
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- MATERIAL:
- STEEL
- PRODUCT NAME:
- SHAFT
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- ROTARY VALVE
- UNITS:
- EACH
$86.94 -
MOOSE RACING Crankcase Bearing and Seal Kit 24-1029
MOOSE RACING
$91.95A failing crankshaft bearing or seal will compromise engine reliability and performance—two things you can't afford to sacrifice on track or trail. The MOOSE RACING Crankcase Bearing and Seal Kit 24-1029 provides precision-engineered components designed...A241029- SKU:
- A241029
- Availability:
- Ships Same Business Day
- Weight:
- 1.40 LBS
- PRODUCT NAME:
- BEARING KIT
- UNITS:
- KIT
- TYPE:
- CRANK
- RIDING STYLE:
- OFF-ROAD
$91.95Qty in Cart: 0Quantity:Price:$91.95Subtotal: -
MOOSE RACING Crankcase Bearing and Seal Kit 24-1030
MOOSE RACING
$83.95A quality crankcase bearing and seal kit is foundational to reliable engine performance—worn bearings introduce play, noise, and premature wear that cascades through your entire drivetrain. The MOOSE RACING 24-1030 kit delivers precision-engineered...A241030- SKU:
- A241030
- Availability:
- Ships Same Business Day
- Weight:
- 1.48 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CRANK
- UNITS:
- KIT
- PRODUCT NAME:
- BEARING KIT
$83.95 -
MOOSE RACING Crankcase Bearing and Seal Kit 24-1002
MOOSE RACING
$76.95A worn or damaged crankshaft bearing assembly compromises engine reliability and performance—especially critical in 2-stroke applications where precision tolerances are non-negotiable. The MOOSE RACING 24-1002 kit delivers OEM-quality bearings with...A241002- SKU:
- A241002
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- TYPE:
- CRANK
- PRODUCT NAME:
- BEARING KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$76.95 -
MOOSE RACING Crankcase Bearing and Seal Kit 24-1004
MOOSE RACING
$85.95A healthy crankshaft is the foundation of engine reliability, and worn bearings or compromised seals will cost you performance and uptime. The MOOSE RACING 24-1004 Crankcase Bearing and Seal Kit delivers precision-engineered components that restore...A241004- SKU:
- A241004
- Availability:
- Ships Same Business Day
- Weight:
- 1.40 LBS
- TYPE:
- CRANK
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- BEARING KIT
$85.95 -
On Sale
ATHENA Crankcase - Yamaha S410130320004
ATHENA
MSRP: $221.95Now: $200.00Was: $221.95Made of special steel and manufactured with CNC high-precision machinery, Standard stroke09210019- SKU:
- 09210019
- Availability:
- Ships Same Business Day
- Weight:
- 2.90 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- CRANKSHAFT
- UNITS:
- EACH
MSRP: $221.95Now: $200.00Was: $221.95 -
On Sale
ATHENA Crankcase - Yamaha YZ85 S410485320002
ATHENA
MSRP: $171.95Now: $155.00Was: $171.95Made of special steel and manufactured with CNC high-precision machinery, Standard stroke09210589- SKU:
- 09210589
- Availability:
- Ships Same Business Day
- Weight:
- 4.16 LBS
- UNITS:
- EACH
- PRODUCT NAME:
- CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
MSRP: $171.95Now: $155.00Was: $171.95Qty in Cart: 0Quantity:Price:MSRP: $171.95Now: $155.00Was: $171.95Subtotal: -
HOT RODS Crankshaft - Stroker 4199
HOT RODS
$202.95A stroker crankshaft is one of the most effective ways to increase displacement and unlock additional torque and horsepower in your ATV engine. The HOT RODS Stroker 4199 pairs a longer stroke with precision-engineered pistons to deliver measurable...09210220- SKU:
- 09210220
- Availability:
- Ships Same Business Day
- Weight:
- 9.30 LBS
- FEATURES:
- HEAVY DUTY CRANKSHAFT
- MATERIAL:
- 4140 STEEL
- MODEL:
- 4-CYCLE
- STROKE LENGTH:
- 56,60 MM
- UNITS:
- ASSEMBLY
- COLOR/FINISH:
- STEEL
- DISPLACEMENT:
- 263 CC
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 56.60 MM
- TYPE:
- STROKER
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
$202.95Qty in Cart: 0Quantity:Price:$202.95Subtotal: -
HOT RODS Crankshaft Kit 4427
HOT RODS
$556.95Whether you're building a high-displacement engine or replacing a worn OEM crankshaft, the HOT RODS Crankshaft Kit 4427 delivers factory-matched precision without the factory limitations. This complete assembly arrives pre-assembled and true to OEM...09210783- SKU:
- 09210783
- Availability:
- Ships Same Business Day
- Weight:
- 7.05 LBS
- DISPLACEMENT:
- 250 CC
- MATERIAL:
- 4140 STEEL
- STROKE LENGTH METRIC:
- 53.60 MM
- TYPE:
- OEM STROKE
- FEATURES:
- STANDARD CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
- MODEL:
- 4-CYCLE
- COLOR/FINISH:
- STEEL
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- UNITS:
- ASSEMBLY
$556.95 -
HOT RODS Crankshaft Kit 4428
HOT RODS
$515.95If you're building a high-performance engine or pushing your existing setup beyond stock limits, the HOT RODS Crankshaft Kit 4428 delivers the reliability and durability you need to survive sustained boost and rpm. Factory-assembled and validated to OEM...09210784- SKU:
- 09210784
- Availability:
- Ships Same Business Day
- Weight:
- 9.85 LBS
- FEATURES:
- STANDARD CRANKSHAFT
- MODEL:
- 4-CYCLE
- DISPLACEMENT:
- 450 CC
- MATERIAL:
- 4140 STEEL
- TYPE:
- OEM STROKE
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- STEEL
- STROKE LENGTH METRIC:
- 62.10 MM
- UNITS:
- ASSEMBLY
$515.95
