Yamaha TT-R250 Owner's Manual page 25

INSTRUMENT AND CONTROL FUNCTIONS
1
2
1
2
3
1. Front fork air valve cap
2. Front fork air valve
4
3. Check the air pressure in each fork
leg with an air pressure gauge.
5
NOTE:
An optional air pressure gauge is avail-
6
able at a Yamaha dealer.
7
4. To increase the spring rate and
thereby harden the suspension, in-
crease the air pressure with an air
8
pump. To decrease the spring rate
and thereby soften the suspen-
9
sion, decrease the air pressure by
pushing each valve stem down.
Spring rate:
Minimum (soft):
Air pressure = 0 kPa (0 psi)
2
(0 kgf/cm )
Standard:
Air pressure = 0 kPa (0 psi)
2
(0 kgf/cm )
Maximum (hard):
Air pressure = 40 kPa (5.8 psi)
2
(0.4 kgf/cm )
CAUTION:
Never exceed the maximum air pres-
sure, otherwise the front fork oil
seals may become damaged.
WARNING
Always adjust both fork legs equal-
ly, otherwise poor handling and loss
of stability may result.
5. Securely install the air valve caps.
Damping force
1. Remove the rubber cap from each
fork leg.
3-8
1. Rubber cap
ECA10090
2. To increase the damping force and
thereby harden the damping, turn
the adjusting screw on each fork
leg in direction (a). To decrease
the damping force and thereby
EWA10180
soften the damping, turn the ad-
justing screw on each fork leg in di-
rection (b).
1