Yamaha YZ250N Owner's Service Manual page 550

SETTING
EC72N000
Drive and driven sprockets setting parts
Part name
Drive sprocket
(STD)
Driven sprocket 2 2
(STD)
EC721002
Tire pressure
Tire pressure should be adjust to suit the road
surface condition of the circuit.
Standard tire pressure:
100 kPa (1.0 kg/cm
9Under a rainy, muddy, sandy, or slippery condi-
tion, the tire pressure should be lower for a larg-
er area of contact with the road surface.
Extent of adjustment:
60~80 kPa
(0.6~0.8 kg/cm
9Under a stony or hard road condition, the tire
pressure should be higher to prevent a flat tire.
Extent of adjustment:
100~120 kPa
(1.0~1.2 kg/cm
7-14
TUN
Size Part number
1 1
13T 9383E-13144
14T 9383E-14215
47T 5ET-25447-00
48T 5ET-25448-00
49T 5ET-25449-00
50T 5ET-25450-00
51T 5ET-25451-00
52T 5ET-25452-00
2 , 15 psi)
2 , 9.0~12 psi)
2 , 15~18 psi)