2003 Yamaha YFM400FAR Kodiak Factory Service Manual, Page 255Get this manual
REAR AXLEFINAL DRIVE GEAR AND DRIVE SHAFT
Final gear lash adjustment 1.Remove: Bearing housing Ring gear shim(s) Ring gear Thrust washer 4
2.Adjust: Gear lash Adjustment steps: Select suitable shim(s) and thrust washer(s) using the following chartToo little gear lash Too large gear lash