1987-2009 Yamaha ATV YFM350X Warrior Raptor Service Manual, Page 79Get this manual
TIRE INSPECTION cold tire pressure Standard 30kpa CO.3kgcm24.3psi) Minimum 27kpa (O.27kgcm 3.9psi) Maximum 33kpa CO.33kgcm 4.7psi)
25kpa (O.25kgcm3.6psi) 22kpa (O.22kgcm23.2psi) 28kpa CO.28kgcm: 4.0psiJ
AWARNING Uneven or improper tire pressure may adversely affect the handling of this machine and may cause loss of control Maintain proper tire pressures Set pressures must be equal in both front tires and equal in both rear tires