1998-2001 Yamaha YFM600FHM Grizzly Factory Service Manual, Page 170Get this manual

CYLINDER AND PISTON

PISTON PIN INSPECTION 1.lnspect: Piston pin Blue discolorationgrooves Replace, then inspect the lubrication system2.Measure: Piston pin-to-piston clearance

Measurement steps: Measure the piston pin outside diameter

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