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:
- Most parts ship next business day
- Modquad parts: Monday–Thursday dispatch
Made-to-Order Items:
- Custom swingarms & A-arms: 2–4 weeks
- EVP exhaust systems: 2–4 weeks
- Sneakers: 1–2 weeks
Stock Guarantee: Items marked "In Stock" ship immediately. Made-to-order items are built fresh for you.
Questions? Contact us—we respond within 24 hours.
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