2003 Yamaha YFM400FAR Kodiak Factory Service Manual, Page 151Get this manual
CYLINDER AND PISTON REMOVING THE PISTON 1.Remove: Piston pin clips Piston pin Piston 3
NOTE: Before removing 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 4Piston pin puller set: PNYU-01304, 90890-01304