Fuel Cock; Tires - Yamaha YTZ250S 1986 Service Manual

Rear wheel
45
Nm
(4.5
m.kg,
32
ft.lb)
Rim size:
S.25 x 9
Rim runout limit:
2 mm (O.OS in)
Tire size : 21
x
11 - 9
Tire pressure (Cold) :
24.5
kPa
(0.25
kg / cm 2
, 3.56
psi)
1. Rear axle
2. Dust seal
3. Oil seal
4. Bearing
1. Block the front tire and raise the rear of
machine.
2. Spin the wheel by hand and toutch the
rear wheel hub while spinning the wheel.
If you feel any excessive vibration, the
bearings are rough and should be
replaced.
Fuel Cock
If either fuel cock is leaking or is excessively
contaminated, it should be removed and
inspec(ed .
1. Remove the fuel €ock and inspect the
filter screen. Replace the filter if it is
seriously contaminated.
2. Remove the screws on the front and rear
of the fuel cock; remove the plate,
gaskets, lever, and diaphragm.
2-14
3. Inspect all components, and replace any
that are damaged. If the fuel cock gasket
surfaces are scratched or corroded, the
fuel cock assembly must be replaced. If
there is abrasive damage to any com-
ponents, the fuel tank must be drained
and flushed.
4. Reassemble the fuel cock and install it.
5.
Connect the fuel pipe.
Tires
WARNING:
This model is equipped with low pressure
tires. Pay attention to the following points:
Recommended tire pressure:
Front: 24.5 kPa (0.25 kg/cm
2 ,
3.56 psi)
Rear 24.5 kPa (0.25 kg/cm
2 ,
3.56 psi)
Vehicle load limit: 100 kg (220 Ib)
Tire size:
Front: 23 x 8 -12
Rear: 21 x 11-9
1. Excessive tire pressure (over 147 kPa
(1.5 kg/cm 2 , 21.3 psi)) may cause tire
to burst. Inflate tires very slowly. Fast
inflation could cause tire to burst.
2. Too Iowa pressure (below minimum
tire pressure) will cause the rim to
dislodge from the tire.
3. Put the same pressure in both rear
tires. Uneven tire pressure will severe-
ly affect the handling.
4. Set tire pressures cold.
How to measure tire pressure
Use an appropriate low-pressure tire gauge.
Set tire pressures to the following
specifications: