2003 Yamaha YFM400FAR Kodiak Factory Service Manual, Page 248Get this manual
REAR AXLEFINAL DRIVE GEAR AND DRIVE SHAFT
POSITIONING THE FINAL DRIVE PINION GEAR AND RING GEAR 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 shim(s)
Final drive pinion gear shim selection 1.Select: Final drive pinion gear shim(s) Selection steps: To find the final drive pinion gear shim thickness "A", use the following formulaFinal drive pinion gear shim thickness: "A"= numeral (usually decimal number) on the final drive pinion gear either added to or subtracted from "84"numeral (usually decimal number) on the final gear case either added to or subtracted from "83"