2002 Yamaha YFM660 Grizzly factory service and repair manual, Page 269Get this manual

FRONT CONSTANT VELOCITY JOINTS AND DIFFERENTIAL GEAR

2.Check: Drive shaft splines Universal joints Front drive gear splines Weardamage ReplaceSpring Fatigue ReplaceMove the spring up and down
3.Check: Front drive shaft Bends Replace
WARNING
Do not attempt to straighten bent shaft; this may dangerously weaken the shaft

• ATV
• Jet Ski
• Outboard Motors
• Personal Watercraft
• Snowmobiles
• Stern Drives