Snowmobile Polaris FS IQ Widetrak (2013 year). Manual - part 12

50

THE PERFECT FIT

Rear Suspension Adjustments

Initial Spring Preload Setting (Sag Method)

To set up the rear suspension torsion spring preload, measure the dis-
tance between the ground and rear bumper. This is measurement X.

Take the first measurement with no rider and with the rear suspension at 
full extension. 

Tip: The rear bumper may need to be raised slightly to fully extend the rear sus-

pension.

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 measure-
ment Y from X (sag=X-Y). Adjust sag by rotating the torsion spring 
preload cams located on the rear torque arm. See page 51.

The ideal amount of sag for this rear suspension is 2.5 inches (6.4 cm) 
(X-Y=2.5 in./6.4 cm).

X

Y

No Rider

With Rider

51

THE PERFECT FIT

Rear Suspension Adjustments

Torsion Spring Preload

To adjust rear torsion spring preload, rotate the three-position cam using 
the engine spark plug tool. This adjustment is easier to make if tension 
is relieved from the spring. Exercise extreme caution if you use this 
method of adjustment, and follow the steps below carefully. 

WARNING! A sudden release of tension from a spring could result in serious 
injury. Wear eye protection and maintain a firm grip on the spring when 
removing and installing it.

1. Grasp the spring firmly with both hands.

2. Maintain a firm grip on the spring and carefully remove the long leg 

from the guide block. Be prepared for a sudden release of tension.

3. Carefully allow the leg to unwind and relieve tension from the cam.

4. Rotate the cam to the desired setting.

5. Rewind the long leg of the spring. Maintain a firm grip on the spring 

while reinstalling it into the guide block.

Tip: Different rate torsion springs are available if a firmer ride is desired. Contact 

your dealer for more information.

The following information is provided only as a guideline to be used for 
initial suspension set-up. Your set-up may vary based on your desired 
riding style.

Soft (long end of cam to front)

Medium (short end of cam up)

Firm (long end of cam up)

Soft

Medium

Firm

52

THE PERFECT FIT

Rear Suspension Adjustments

Limiter Strap Position (Ski Pressure)

The following information is 
provided only as a guideline to 
be used for initial suspension 
set-up. Your set-up may vary 
based on your desired riding 
style.

High: Limiter strap in high 
position

 

increases ski pressure

Low: Limiter strap in low 
position decreases ski pressure

High

Low

53

THE PERFECT FIT

Rear Suspension Adjustments

Shock Compression Valving

The rear track shocks for this model are gas charged shocks. The valv-
ing on the gas charged shocks is pre-set.