1997 Yamaha YFM600FWAK ATV Service Manual, Page 136Get this manual
CYLINDER AND PISTON PISTON REMOVAL 1.Remove: Piston pin clips CD Piston pin Piston
NOTE: Put identification marks on each piston head for reference during reinstallation Before removing each piston pin, deburr the clip groove and pin hole areaIf the piston pin groove is deburred and the piston pin is still difficult to remove, use the piston pin puller
Piston pin puller:
PINYU-01304, 90890-01304