2003 Yamaha YFM400FAR Kodiak Factory Service Manual, Page 111Get this manual
CHECKING THE TIRES CHK ADJ
TIRE CHARACTERISTICS 1)Tire characteristics influence the handling of ATVsThe tires listed below have been approved by Yamaha Motor Co Ltdfor this modelIf other tire combinations are used, they can adversely affect your machine's handling characteristics and are therefore not recommendedManufacturer Front Rear MAXXIS MAXXIS Size Type AT25 8-12 M911Y AT25 10-12 M912Y