1998-2001 Yamaha YFM600FHM Grizzly Factory Service Manual, Page 251Get this manual
REAR AXLEFINAL DRIVE GEAR AND DRIVE SHAFT
FINAL DRIVE PINION GEAR AND RING GEAR POSITIONING
When the final drive pinion gear, ring gear, final gear case andor ring gear bearing housing are replaced, be sure to adjust the positions of the final drive pinion gear and ring gear using the shim(s)
Final drive pinion gear shim(s) selection 1.Select: Final drive pinion gear shim(s) CD
Shim selection steps: eTo find the final drive pinion gear shim thickness" A", use the following formula
Final drive pinion gear shim thickness: