Yamaha TT-R250, Owner'S Manual

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