Suspension - Yamaha RST90G Owner's Manual

 The fuel tank should be filled with the
recommended gasoline. The use of oth-
er gasoline will cause severe damage to
internal engine parts, such as the valves
and piston rings, as well as to the ex-
haust system.
ESU14880

Suspension

The suspension can be adjusted to suit rider
preference. Softer settings, for example, may
provide greater rider comfort, while harder
settings may allow more precise handling
and control over certain types of terrain or
riding conditions.
If you are not familiar with suspension adjust-
ments, have a Yamaha dealer make these
adjustments.
EWS00152
WARNING
Read and understand the following infor-
mation before handling shock absorbers
that contain highly pressurized nitrogen
gas.
 Do not tamper with or attempt to open
the cylinder assemblies.
 Do not subject the shock absorbers to
an open flame or other high heat source.
This may cause the unit to explode due
to excessive gas pressure.
 Do not deform or damage the cylinders
in any way. Cylinder damage will result
in poor damping performance.
 Do not dispose of a damaged or worn
out shock absorber yourself. Take the
shock absorber to a Yamaha dealer for
any service.
TIP
A special wrench can be obtained at a
Yamaha dealer.
Control functions
ESU10895
Adjusting the spring preload of the
front shock absorbers
EWS00721
WARNING
The spring preload of the left and right
shock absorbers must be adjusted to the
same setting. Uneven settings can cause
poor handling and loss of stability.
The spring preload can be adjusted by turn-
ing the adjusting nuts.
Adjust the spring preload as follows.
1. Loosen the locknut.
2. To increase the spring preload and
thereby harden the suspension, turn the
adjusting nut in direction (a). To decrease
the spring preload and thereby soften
the suspension, turn the adjusting nut in
direction (b).
1
3
2
1. Locknut
2. Distance A
3. Spring preload adjusting nut
TIP
The spring preload setting is determined by
measuring distance A, shown in the illustra-
tion. The longer distance A is, the higher the
spring preload; the shorter distance A is, the
lower the spring preload.
(a)
(b)
37