Yamaha YZ450F(T) Owner's Service Manual page 624

È
SETTING
EC722011
Front fork setting
The front fork setting should be made depend-
ing on the rider's feeling of an actual run and
the circuit conditions.
The front fork setting includes the following
three factors:
1. Setting of air spring characteristics
• Change the fork oil amount.
2. Setting of spring preload
• Change the spring.
• Install the adjustment washer.
3. Setting of damping force
• Change the compression damping.
• Change the rebound damping.
The spring acts on the load and the
damping force acts on the cushion travel
speed.
EC723001
Change in amount and characteristics of
fork oil
Damping characteristic near the final stroke
can be changed by changing the fork oil
amount.
CAUTION:
Adjust the oil amount in 5 cm
0.2 US oz) increments or decrements. Too
small oil amount causes the front fork to
produce a noise at full rebound or the rider
to feel some pressure on his hands or
body. Alternatively, too large oil amount
will develop unexpectedly early oil lock
with the consequent shorter front fork
travel and deteriorated performance and
characteristics. Therefore, adjust the front
fork within the specified range.
Standard oil amount:
260 cm
*270 cm
Extent of adjustment:
200 ~ 300 cm
(7.04 ~ 10.6 Imp oz,
6.76 ~ 10.1 US oz)
* For EUROPE
È Air spring characteristics in relation to oil amount
change
É Load
Ê Stroke
1 Max. oil amount
2 Standard oil amount
3 Min. oil amount
7 - 13
T U N
3
(0.2 Imp oz,
3
(9.15 Imp oz, 8.79 US oz)
3
(9.50 Imp oz, 9.13 US oz)
3