1997 Yamaha YFM600FWAK ATV Service Manual, Page 228Get this manual
REAR AXLEFINAL DRIVE GEAR AND DRIVE SHAFT
FAINAL DRIVE GEAR ASSEMBLY 1.lnstall: Drive pinion gear (with shim(s) and bearing) Shim(s) (proper size as calculated) Bearing retainer (drive pinion gear) CD Use bearing retainer wrench