Yamaha WR250F Manuel D'atelier page 658

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SETTING
EC72N000
Drive and driven sprockets setting parts
Part name Size
Drive sprocket 1
(STD) 13T
Rear wheel
48T
sprocket 2
50T
(STD) 52T
54T
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
Under a rainy, muddy, sandy, or slippery
condition, the tire pressure should be lower
for a larger area of contact with the road sur-
face.
Extent of adjustment:
60 ~ 80 kPa
(0.6 ~ 0.8 kg/cm
Under 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
T U N
Part number
9383B-13218
5GS-25448-50
5GS-25450-50
5GS-25452-50
5PH-25454-50
2
, 15 psi)
2
, 9.0 ~ 12 psi)
2
, 15 ~ 18 psi)