Polaris 2002 Snowmobile Owner's Manual page 54

THE PERFECT FIT
Rear Suspension Adjustments
Rear Suspension Initial Spring Preload Setting
Xtra-10, EDGE and Xtra Lite (Sag Method)
To set up the EDGE rear suspension
torsion spring preload, measure the
distance between the ground and rear
bumper. This is measurement X.
Take the first measurement with no
rider and with the rear suspension at
X
full extension. NOTE: The rear
bumper may need to be lifted upward
slightly to fully extend the rear
suspension.
Next, have the rider drop down hard
on the seat and bounce up and down
several times, collapsing the rear
suspension. With the rider seated,
measure the distance between the
ground and the rear bumper at the
exact location used for measurement
Y
X. This is measurement Y.
To determine sag, commonly referred
to as ride-in, subtract measurement Y
from X (Sag=X-Y). Adjust sag by
rotating the torsion spring preload cams located on the rear torque arm.
Use the illustration or the decal found under the hood for reference.
The ideal amount of Sag for the EDGE rear suspension is four inches
(X-Y=4).
If the rear suspension rides in less than three inches or more than five
inches with the torsion spring preload cams at their maximum range of
adjustment, optional torsion springs (softer or stiffer, respectively) may
be required. This is only an initial set-up, and final spring preload may
vary based on rider preference and riding conditions.
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