INSTRUMENT AND CONTROL FUNCTIONS
4-10
2
3
4
5
6
7
8
9
EAU14673
Adjusting the front fork
WARNING
EWA10180
Always adjust both fork legs equal-
ly, otherwise poor handling and loss
of stability may result.
The front fork is equipped with air
valves for adjusting the spring rate and
screws for adjusting the damping force.
NOTICE
ECA10091
To avoid damaging the front fork oil
seals, do not exceed the maximum
air pressure.
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 7-32.
TIP
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.
TIP
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.
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
1. Front fork air valve cap
2. Front fork air valve
1
2
Spring rate:
Minimum (soft):
Air pressure = 0 kPa (0 kgf/cm
2
,
0 psi)
Standard:
Air pressure = 0 kPa (0 kgf/cm
2
,
0 psi)
Maximum (hard):
Air pressure = 40 kPa (0.4 kgf/cm
2
,
5.8 psi)
1. Rubber cap
1
Summary of Contents for TT250RA
Page 1: ...OWNER S MANUAL 4PX 28199 2G TT250RA Read this manual carefully before operating this vehicle ...
Page 10: ...LOCATION OF IMPORTANT LABELS 1 3 1 2 3 4 5 6 7 8 9 1 ...
Page 86: ...INDEX W Wheel bearings checking 7 26 Wheel front 7 32 Wheel rear 7 34 Wheels 7 17 ...
Page 87: ......
Page 88: ...PRINTED ON RECYCLED PAPER YAMAHA MOTOR CO LTD PRINTED IN JAPAN 2010 05 0 2 1 E ...