Yamaha TT250RX 2007, Owner'S Manual

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INSTRUMENT AND CONTROL FUNCTIONS
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EAU14671
Adjusting the front fork
The front fork is equipped with air
valves for adjusting the spring rate and
screws for adjusting the damping force.
WARNING
EWA10190
There should be no difference in air
pressure between the fork legs.
Spring rate
The total spring rate is adjusted by
changing the air pressure as follows.
1. Lift the front wheel off the ground
according to the procedure on
page 6-31.
NOTE:
When checking and adjusting the air
pressure, there should be no weight on
the front end of the vehicle.
2. Remove the air valve cap from
each fork leg.
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.
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
)
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