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...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...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
$85.95Qty in Cart: 0Quantity:Price:$85.95Subtotal: -
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...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...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...A241011- SKU:
- A241011
- Availability:
- Ships Same Business Day
- Weight:
- 1.65 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- CRANK
- PRODUCT NAME:
- BEARING KIT
$109.95Qty in Cart: 0Quantity:Price:$109.95Subtotal: -
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...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...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...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...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...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...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...A241029- SKU:
- A241029
- Availability:
- Ships Same Business Day
- Weight:
- 1.40 LBS
- PRODUCT NAME:
- BEARING KIT
- UNITS:
- KIT
- TYPE:
- CRANK
- RIDING STYLE:
- OFF-ROAD
$91.95 -
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...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...A241002- SKU:
- A241002
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- TYPE:
- CRANK
- PRODUCT NAME:
- BEARING KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$76.95Qty in Cart: 0Quantity:Price:$76.95Subtotal: -
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...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: $171.95 -
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...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...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...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
