This Wiseco replacement bottom end crankshaft kit is designed for the specific Yamaha applications listed below. Crankshafts are factory assembled and precision trued to OEM specifications.

Key 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.