Wiseco Crankshaft Assembly with Bearings and Gasket for 2003-2012 Yamaha YZ250F WPC140

If you're rebuilding a YZ250F bottom end, you need a crankshaft assembly that can handle the demands of consistent high-RPM operation without compromise. The Wiseco WPC140 delivers factory-grade precision with reinforced components specifically engineered to outlast stock assemblies. This complete kit eliminates the guesswork—everything you need arrives factory-assembled and trued to OEM specs, so you can focus on getting back to the track.

Built from double-forged connecting rods and treated with shot-peening to eliminate internal stresses, this crankshaft resists fatigue and maintains dimensional stability through extended use. The precision-honed bearing surfaces and optimized oiling slots ensure consistent lubrication under load, while caged needle roller bearings support sustained high-RPM performance. Whether you're a professional racer or a dedicated mechanic, this assembly represents the reliability you need when durability matters.

• Double-forged connecting rods
• Factory-assembled, OEM-trued
• Shot-peened surfaces
• Corrosion-resistant treatment
• Precision honed bearings
• Caged needle roller bearings
• Optimized oiling slots
• Fits 2003-2012 Yamaha YZ250F
• Complete rebuild kit included
• High-RPM capable