2006 Polaris FST Touring Owners Manual - Page 53

2006 Polaris FST Touring Manual

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THE PERFECT FIT Switchback Rear Suspension Initial Spring Preload Setting (Sag Method) To set up the rear suspension torsion spring preload, measure the distance between the ground and rear bumper. This is measurement X. Take this measurement with no rider and with the rear suspension at full extension. NOTE: The rear bumper may need to be lifted upward slightly to fully extend the 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 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. See illustration. The ideal amount of sag for this rear suspension is five inches (12.7 cm) (X-Y=5 in./12.7 cm). If the rear suspension rides in less than four inches or more than six 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 setup, and final spring preload may vary based on rider preference and riding conditions. 50

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50
THE PERFECT FIT
Switchback Rear Suspension
Initial Spring Preload Setting (Sag Method)
To set up the rear suspension
torsion spring preload, measure
the distance between the ground
and rear bumper. This is
measurement X.
Take this measurement with no
rider and with the rear suspension
at full extension.
NOTE:
The rear bumper may
need to be lifted
upward slightly to fully
extend the 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 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. See illustration.
The ideal amount of sag for this rear suspension is five inches (12.7
cm) (X-Y=5 in./12.7 cm).
If the rear suspension rides in less than four inches or more than six
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 setup, and final spring preload may
vary based on rider preference and riding conditions.