Wiseco WPC123 Crankshaft Assembly for Yamaha YZ85

Main bearings are manufactured to the highest quality standards; each is case hardened for maximum life and smooth operation at high RPM's. Corrosion-resistant surface treatment to prevent corrosion and pitting over long term use or storage; this will add to the life as well the strength of the assembly. Top end of rod is bushed for oil retention and eliminates pin galling; the bottom end rod bores are case hardened to 58-62 RC to optimize bearing running surface. The crank pin bearings are manufactured from the highest quality, hot rolled steel case hardened to 58-62 RC to extend the lifetime of the assembly. Caged needle roller bearings to provide the highest possible RPM.
Fits:
YAMAHA
YZ85 02-18