1997 Yamaha YFM600FWAK ATV Service Manual, Page 223Get this manual
REAR AXLEFINAL DRIVE GEAR AND DRIVE SHAFT 1DRIV 1
Remove the ring gear assembly Measure the thrust clearanceCalculate the width of the flattened Plastigauge CDRing gear thrust clearance: 0.1 0.2 mm (0.004 0.008 in) .If out of specification, select the correct washer
Thrust washer selection steps: .Select suitable thrust washer using the following chartThrust washer Thickness (mm) 1.2 1.8 1.4 2.0 1.6