Yamaha Blaster Crankshaft Bearings – KOYO by Wiseco

Yamaha Blaster Crankshaft Bearings Yamaha Blaster crankshaft main bearings manufactured by KOYO and supplied by Wiseco. Replacement bearings for supporting the crankshaft during a bottom-end engine rebuild. Application and Purpose These are crankshaft main bearings. They are separate from the connecting rod’s big-end bearing, piston wrist-pin bearing and transmission shaft bearings. Inspect the crankshaft journals and crankcase bearing seats during disassembly. Installing new bearings will not correct worn journals or damaged bearing seats. Installation Follow Yamaha’s service procedures for crankcase disassembly, bearing installation and crankshaft assembly. Keep the bearings clean and use installation methods that avoid transferring force through the…