2004-2005 660 Yamaha Rhino Factory Service Manual, Page 282Get this manual
REAR CONSTANT VELOCITY JOINTS, FINAL DRIVE GEAR AND DRIVE SHAFT
MEASURING AND ADJUSTING THE FINAL GEAR LASH Measuring the final gear lash 1Secure the gear case in vise or another supporting device2Remove: drain plug gasket 3Install: bolt of the specified size (into the drain plug hole) CAUTION: Finger tighten the bolt until it holds the ring gearOtherwise, the ring gear will be damaged