2002 Yamaha YFM660 Grizzly factory service and repair manual, Page 43Get this manual
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MAINTENANCE SPECIFICATIONS Item Piston: Piston to cylinder clearance Piston size "D" Standard 0.050.07 mm (0.00200.0028 in) 99.94599.995 mm (3.93483.9368 in)
-22.045 mm (0.8679 in) 21.971