2002-2006 Yamaha YFR450FAR Service Manual LIT-11616-16-01, Page 118Get this manual
CHECKING THE TIRE CHK ADJ
TIRE CHARACTERISTICS 1)Tire characteristics influence the handling of ATV'sThe 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 Size Type CHENG SHIN AT25 8-12 M911Y CHENG SHIN AT25 10-12 M912Y