Yamaha TT-R TT250RN Owner's Manual page 29

INSTRUMENT AND CONTROL FUNCTIONS
4. To increase the spring rate and
thereby harden the suspension,
increase the air pressure with an
1
air pump or compressed air. To
decrease the spring rate and
2
thereby soften the suspension,
decrease the air pressure by
3
pushing each valve stem down.
Spring rate
4
Minimum (soft):
Air pressure = 0 kPa
5
(0 kgf/cm 2 , 0 psi)
Standard:
6
Air pressure = 0 kPa
(0 kgf/cm 2 , 0 psi)
7
Maximum (hard):
Air pressure = 40 kPa
8
(0.4 kgf/cm 2 , 0.4 psi)
9
cC
Never exceed the maximum air
pressure, otherwise the front fork
oil seals may become damaged.
w
Always adjust
equally, otherwise poor handling
and loss of stability may result.
5. Securely install the air valve
caps.
EC000012
EW000035
both fork legs
1. Rubber cap
Damping force
3-10
1
1. Remove the rubber cap from
each fork leg.