WISECO – Crankshaft Kit – Yamaha YFM660F Grizzly/YXR660 Rhino

Description

Crankshaft Kit – Yamaha YFM660F Grizzly/YXR660 Rhino

Features

• Crankshafts are factory assembled and precision trued to OEM specifications
• Double-forged Wiseco connecting rods maintain superior dimensional consistency through improved grain flow
• Shot-peening eliminates residual stresses and smoothly blends the rod forging surfaces
• Corrosion-resistant surface treatment
• Crank pin bearing radial running clearance is optimized to ensure maximum performance
• Precision honing ensures ultra round bearing surface
• Precision engineered oiling slots maximize rod strength and bearing life
• Double-drilled small ends provide the piston pin with extra lubrication and cooling, reducing distortion of top end due to thermal transfer from the piston
• Kit includes crankshaft assembly, main bearings, and bottom-end gasket kit