ATV/UTV Crankshafts and Parts
ATV/UTV Crankshafts & Parts at JJ Motorsports
Rebuild your ATV/UTV crankshaft for maximum reliability and performance with premium kits from JJ Motorsports, featuring balanced, heavy-duty assemblies and components for Yamaha Blaster, Banshee, and similar 2-stroke models. These high-quality crankshafts deliver smooth rotation and high-RPM durability in off-road and racing conditions.
Shop Hot Rods and Wiseco crankshafts for race-proven strength. Explore related categories such as ATV/UTV engine for pistons and gaskets, or ATV/UTV for exhaust and suspension to complete your bottom-end rebuild and ride with total confidence across all conditions, from high-speed dunes to technical trails.
Top ATV/UTV Crankshafts & Parts
- Hot Rods Crankshaft Kit CBK0218 – Complete crankshaft kit with bearings and seals; fits Yamaha Blaster for stock rebuilds.
- Hot Rods Crankshaft Kit CBK0221 – Heavy-duty kit with stroker crank; boosts displacement for Banshee performance builds.
- Wiseco Crankshaft WPC148 – Forged crankshaft for 2-stroke engines; precision-balanced for Suzuki LT250R and Kawasaki KX models.
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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HOT RODS Crankshaft - Stroker 4186
HOT RODS
$364.95If you're serious about maximizing displacement and low-end torque in your four-stroke ATV, a stroker crankshaft is one of the most effective bolt-on upgrades available. The HOT RODS 4186 Stroker...09210429- SKU:
- 09210429
- Availability:
- Ships Same Business Day
- Weight:
- 9.45 LBS
- COLOR/FINISH:
- STEEL
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- RIDING STYLE:
- ATV
- STROKE LENGTH METRIC:
- 65.10 MM
- MODEL:
- 4-CYCLE
- STROKE LENGTH:
- 65,10 MM
- UNITS:
- ASSEMBLY
- DISPLACEMENT:
- 471 CC
- TYPE:
- STROKER
- FEATURES:
- HEAVY DUTY CRANKSHAFT
- MATERIAL:
- 4140 STEEL
$364.95Qty in Cart: 0Quantity:Price:$364.95Subtotal: -
HOT RODS Crankshaft Assembly 4059
HOT RODS
$588.95If you're building a high-performance long-stroke engine for your ATV, you need a crankshaft assembly that's been engineered to handle sustained power delivery without compromise. The HOT RODS...09210033- SKU:
- 09210033
- Availability:
- Ships Same Business Day
- Weight:
- 9.81 LBS
- FEATURES:
- HEAVY DUTY CRANKSHAFT
- MATERIAL:
- 4140 STEEL
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- STROKE LENGTH METRIC:
- 62.60 MM
- UNITS:
- ASSEMBLY
- MODEL:
- 4-CYCLE
- RIDING STYLE:
- ATV
- COLOR/FINISH:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- OEM STROKE
- DISPLACEMENT:
- 400 CC
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
$588.95Qty in Cart: 0Quantity:Price:$588.95Subtotal: -
HOT RODS Crankshaft Assembly 4027
HOT RODS
$420.95If you're building a long-stroke engine for your ATV, you need a crankshaft assembly engineered specifically for the job—not a compromised adaptation. The HOT RODS Crankshaft Assembly 4027 arrives...H120- SKU:
- H120
- Availability:
- Ships Same Business Day
- Weight:
- 8.50 LBS
- DISPLACEMENT:
- 250 CC
- MODEL:
- 2-CYCLE
- RIDING STYLE:
- ATV
- STROKE LENGTH METRIC:
- 70.00 MM
- MATERIAL:
- 4140 STEEL
- UNITS:
- ASSEMBLY
- FEATURES:
- STANDARD CRANKSHAFT
- TYPE:
- OEM STROKE
- COLOR/FINISH:
- STEEL
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
$420.95Qty in Cart: 0Quantity:Price:$420.95Subtotal: -
HOT RODS Crankshaft 4432
HOT RODS
$322.95A quality crankshaft is the backbone of any high-performance engine build, and the HOT RODS 4432 delivers the reliability and precision you need for sustained power delivery. Factory-assembled and...09210604- SKU:
- 09210604
- Availability:
- Ships Same Business Day
- Weight:
- 16.30 LBS
- DISPLACEMENT:
- 550 CC
- RIDING STYLE:
- UTV
- STROKE LENGTH METRIC:
- 82.00 MM
- COLOR/FINISH:
- STEEL
- MATERIAL:
- 4140 STEEL
- TYPE:
- OEM STROKE
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- UNITS:
- ASSEMBLY
- FEATURES:
- STANDARD CRANKSHAFT
- MODEL:
- 4-CYCLE
- RIDING STYLE:
- ATV
$322.95Qty in Cart: 0Quantity:Price:$322.95Subtotal: -
PROX Crankshaft 10.2456
PROX
$387.25A crankshaft is the backbone of your engine's reliability and performance—it converts combustion force into usable power while handling extreme rotational stresses. The PROX Crankshaft 10.2456 is a...09210803- SKU:
- 09210803
- Availability:
- Ships Same Business Day
- Weight:
- 9.75 LBS
- PRODUCT NAME:
- CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$387.25Qty in Cart: 0Quantity:Price:$387.25Subtotal: -
On Sale
EPI Crankshaft Seal WE522162
EPI
MSRP: $14.99Now: $13.49Was: $14.99A worn or leaking crankshaft seal will compromise engine reliability and performance on your Polaris 2-stroke ATV. The EPI WE522162 is engineered to maintain proper combustion chamber sealing,...WE522162- SKU:
- WE522162
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- PRODUCT NAME:
- SEAL
- RIDING STYLE:
- SNOW
- TYPE:
- CRANKSHAFT
MSRP: $14.99Now: $13.49Was: $14.99 -
On Sale
EPI Crankshaft Seal WE524120
EPI
MSRP: $21.99Now: $19.79Was: $21.99A worn or damaged crankshaft seal compromises engine compression and invites fuel and oil leakage—problems that quickly escalate into costly repairs. The EPI WE524120 restores the critical seal...WE524120- SKU:
- WE524120
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- PRODUCT NAME:
- SEAL
- TYPE:
- CRANKSHAFT
- RIDING STYLE:
- ATV
- UNITS:
- EACH
MSRP: $21.99Now: $19.79Was: $21.99Qty in Cart: 0Quantity:Price:MSRP: $21.99Now: $19.79Was: $21.99Subtotal: -
On Sale
EPI Crankshaft Seal WE524581
EPI
MSRP: $14.99Now: $13.49Was: $14.99A compromised crankshaft seal accelerates wear on critical engine components and invites contamination into your powerplant. The EPI WE524581 delivers OEM-spec sealing performance, keeping your...WE524581- SKU:
- WE524581
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- RIDING STYLE:
- SNOW
- TYPE:
- CRANKSHAFT
- PRODUCT NAME:
- SEAL
- RIDING STYLE:
- ATV
- UNITS:
- EACH
MSRP: $14.99Now: $13.49Was: $14.99Qty in Cart: 0Quantity:Price:MSRP: $14.99Now: $13.49Was: $14.99Subtotal: -
On Sale
EPI Crankshaft Seal WE524725
EPI
MSRP: $24.99Now: $22.49Was: $24.99A worn or failing crankshaft seal on your Polaris 2-stroke ATV will compromise engine integrity and lead to costly damage down the line. The EPI WE524725 is engineered to OEM specifications, ensuring...WE524725- SKU:
- WE524725
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- PRODUCT NAME:
- SEAL
- UNITS:
- EACH
- TYPE:
- CRANKSHAFT
- RIDING STYLE:
- ATV
MSRP: $24.99Now: $22.49Was: $24.99Qty in Cart: 0Quantity:Price:MSRP: $24.99Now: $22.49Was: $24.99Subtotal:
