Suspension - Yamaha GCH I 237 Owner's Manual

in your eyes, see your doctor immediately.
If gasoline spills on your skin, wash with
soap and water. If gasoline spills on your
clothing, change your clothes.
Recommended fuel:
Min 91 RON UNLEADED GASOLINE
ONLY (RUS)
Min 95 RON UNLEADED GASOLINE
ONLY (FIN)(SWE)
Fuel tank capacity:
40.0 L (10.57 US gal, 8.80 Imp.gal)
Your Yamaha engine has been designed to
use unleaded gasoline with a research oc-
tane number of 95 or higher. (For Russia, reg-
ular unleaded gasoline with a pump octane
number [(R+M)/2] of 86 or higher, or a re-
search octane number of 91 or higher.)
ECS00095
NOTICE
 Make sure that snow or ice does not en-
ter the fuel tank when refueling.
 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.
ESU10875

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.
Control functions
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.
ESU10885
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 rings.
To increase the spring preload and thereby
harden the suspension, turn the adjusting
ring in direction (a). To decrease the spring
preload and thereby soften the suspension,
turn the adjusting ring in direction (b).
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