Yamaha Ultramatic GRIZZLY 660 Owner's Manual page 59

4. Use no more than the following
pressures when seating the tire
beads.
Front 250 kPa (2.5 kgf/cm
Rear 250 kPa (2.5 kgf/cm
Higher pressures may cause the
tire to burst. Inflate the tires very
slowly and carefully. Fast inflation
could cause the tire to burst.
2
, 36 psi)
2
, 36 psi)
5-11