Polaris Trail RMK Owner's Manual page 38

THE PERFECT FIT
Rear Suspension Adjustments
Initial Spring Preload Setting (Sag Method))
To determine sag, commonly referred to as ride-in, subtract measure-
ment Y from X (sag=X-Y). Adjust sag by rotating the torsion spring
preload cams located on the rear torque arm. Use the illustration for ref-
erence. The ideal amount of Sag for the this 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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