2002 Yamaha YFM660 Grizzly factory service and repair manual, Page 261Get this manual
TROUBLESHOOTING Troubleshooting chart When basic condition "a" and "b" exist, check the following points: Elevate and spin both wheelsFeel for wheel bearing damageYES
Replace the wheel bearing(Refer to "STEERING SYSTEM" and "REAR KNUCKLE AND STABILIZER" in CHAPTER 8
Check the wheel nuts and hub nuts for tightness
Torque to specification(Refer to "FRONT WHEELS AND BRAKE DISCS" and "REAR WHEELS AND BRAKE DISC" in CHAPTER 8
Check the front constant velocity jointFeel for bearing damage
Constant velocity joint bearings and differential gear bearings are probably not damagedRepeat the test or remove the individual components