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NOTE: Shock Pressure should be
checked/added at room temperature
of 65 to 70 degrees. The following
settings are recommended but vary
on rider preference or style.
Initial Setting Chart
Front
Model
Shock
(Ski)
129" Models
75 psi
Long Track
100 psi
Models
M-TX, X-TX
90 psi
LE Models
(Main
Chamber)
150 psi
(Evol
Chamber)
R-TX LE
100 psi
(SR10RL)
(Main
Models
Chamber)
200 psi
(Evol
Chamber)
NOTE: Care should be taken to
have equal pressure in the front ski
shocks before operating the snow-
mobile.
To increase or decrease air pressure, use
the following procedure.
NOTE: When adjusting air pres-
sure, all weight must be removed
from the suspension, and the shock
absorbers must be fully extended.
1. Remove the air valve cap from the
shock.
2. Thread the valve of Shock Absorber
Air Pump onto the shock air valve
approximately six rotations.
NOTE: As the pump is being attached
to the shock, the hose will fill with air.
This will result in a lower gauge pres-
sure of 0.14-0.35 kg/cm
3. To decrease air pressure in the
shock, press the black bleed valve
button half way down and hold until
desired pressure is attained.
Front
Rear
Arm
Arm
Shock
Shock
N/A
N/A
N/A
130 psi
50 psi
150 psi
(Main
(Main
Cham-
Cham-
ber) 125
ber)
psi (Evol
250 psi
Chamber)
(Evol
Cham-
ber)
N/A
N/A
2
(2-5 psi).
NOTE: Pressing the button fully
down and releasing it will allow only
a small amount of air to escape
(micro-adjust).
4. To increase air pressure in the shock,
pump until desired pressure is attained.
5. Remove the pump valve from the
shock air valve.
NOTE: As the pump valve is being
removed from the shock, the sound
of air loss is from the pump hose,
not from the shock.
6. Install the air valve cap onto the
shock.
Adjusting Skid Frame
Front Arm Spring
The skid frame front arm shock spring ten-
sion and the limiter straps are adjustable.
However, Yamaha recommends that the
shock spring be maintained at the factory pre-
set of 3.2-6.4 mm (1/8-1/4 in.) preload. Tight-
ening the skid frame front arm shock spring
may cause improper balance and may ruin
the handling features of the snowmobile.
The length adjustment of the front arm
limiter straps determines the weight distri-
bution between the front of the skid frame
and the skis. Tightening the limiter strap
(shortening the strap) will pull up on the
front of the skid frame and will increase ski
pressure. Loosening the limiter strap
(lengthening the strap) lowers the front of
the skid frame and decreases ski pressure.
When customizing the amount of ski
pressure, be sure to adjust both straps
equally and do not over-adjust the limiter
straps to adversely affect steering and
operator control of the snowmobile.
Some experimentation may be required
until the proper adjustment for the opera-
tor's individual style is obtained.
35
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