Wiseco Crankshaft Kit - Yamaha YZ250/YZ250X (2003-2025) - Complete Bottom End Rebuild
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Wiseco Crankshaft Kit - Yamaha YZ250/YZ250X - Complete Bottom End
Premium Wiseco complete crankshaft kit for Yamaha YZ250 and YZ250X 2-stroke motocross and off-road bikes. Factory assembled and precision trued to OEM specifications!
⚠️ Important Note
Not compatible with 2024 Yamaha YZ250/YZ250X models.
Kit Includes
- Crankshaft Assembly (Factory Assembled & Trued)
- Bottom End Gasket Kit #WB1051
- Main Bearing #B5011
Key Features
- Factory Assembled - Precision trued to OEM specifications
- Double-Forged Connecting Rods - Superior dimensional consistency through improved grain flow
- Shot-Peened - Eliminates residual stresses, smoothly blends rod forging surfaces
- Corrosion-Resistant Surface Treatment
- Optimized Crank Pin Bearing Clearance - Maximum performance
- Precision Honed - Ultra round bearing surface
- Double-Drilled Small Ends - Extra piston pin lubrication and cooling
- Precision Engineered Oiling Slots - Maximum rod strength and bearing life
Specifications
- Material: Steel
- Stroke Length: 72.00 mm
- Displacement: 250cc
- Weight: 12.16 lbs
Fitment
- Yamaha YZ250: 2003-2023, 2025
- Yamaha YZ250X: 2016-2025
Note: Does NOT fit 2024 YZ250/YZ250X models.
📦 Shipping Information
In-stock items ship next business day. ModQuad parts dispatch Monday through Thursday.
Made-to-order and custom powder coat items show their lead time at the top of this page, right next to the truck icon. These are built fresh for you, so timing varies by brand and current backlog.
Need something by a specific date? Call us at 541-668-7503 before ordering and we will check stock and ETA on that exact part. We can often point you to an in-stock alternative from another distributor.
Questions? Contact us, we respond within 24 hours.
