1997 Yamaha YFM600FWAK ATV Service Manual, Page 226Get this manual
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REAR AXLEFINAL DRIVE GEAR AND DRIVE SHAFT 1DRIV 1 1.5 mm (0.06 in)
4.Attach: Gear lash measurement tool Dial gauge '
Gear lash measurement tool: PINYM-01231, 90890-01231