Snowmobile Polaris 600 IQ Touring (2010 year). Manual - part 13

53

THE PERFECT FIT

Rear Suspension Adjustments

Rider weight, riding style, trail conditions, and vehicle speed all affect 

suspension action.
Each rear suspension can be adjusted to suit rider preference and deliver 

excellent performance for a given set of conditions. However, all sus-

pension designs and adjustments involve a compromise, or trade-off. 

For example, a suspension set up for snow-cross racing would provide a 

very stiff ride on the trail. A suspension set up for trail riding would bot-

tom out harshly on a snow-cross course.
Refer to the suspension setup label on your snowmobile, or see your 

Polaris dealer for initial suspension setup information. Additional 

adjustments can be made after initial setup. Make adjustments to one 

area at a time so you can evaluate the change. For further assistance, see 

your dealer.

Suspension Performance Tips

• Rider weight usually determines the position at which the spring pre-

load should be set. However, this may vary with riding style. With a 

little experimentation, each rider can find a preferred set-up. These 

adjustments are easy to make, involve very little time or effort, and 

greatly affect the ride.

• In deep snow, a new rail slide will offer improved performance over a 

worn slide. It can also improve top speed.

• When riding on ice or hard-packed snow, adding a set of bogie wheels 

to the rail may enhance the machine's performance. Bogie wheel kits 

are available from your dealer.

• Polaris offers track kits for improved flotation in deep snow. See your 

dealer for assistance.

Tip: Keep the suspension pivot points lubricated. This will reduce moisture and 

rust build-up and ensure proper function of the suspension components. 

Grease rear suspension pivots before adjusting the rear suspension. Refer 

to the suspension lubrication information beginning on page 89.

54

THE PERFECT FIT

IQ Rear Suspension Adjustments

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 the first measurement with no 

rider and with the rear suspension at 

full extension. 

Tip: 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 measure-

ment X. This is measurement Y.
To determine sag, commonly 

referred to as ride-in, subtract measurement Y from X (sag=X-Y). If the 

measured sag is incorrect, adjust the FRA position and/or rear torsion 

spring preload.

Tip: This is only an initial setup, and final spring preload may vary based on rider 

preference and riding conditions. Accessory springs with a higher load rat-

ing are available for some models. Please see your dealer for availability.

Suspension Recommended Sag

Adjustment

See 

Page

IQ Comfort 

(136)

4-5 inches (10-13 cm)

Torsion Spring 

Preload

55

X

Y

55

THE PERFECT FIT

IQ Rear Suspension Adjustments

Torsion Spring Preload

To adjust rear torsion spring preload, rotate the three-position cam using 

the engine spark plug tool. Adjustment is easiest when the cam is 

rotated from low to medium, and then to high. Rotating directly from 

low to high will require significantly more effort.
Different rate torsion springs are available if a firmer ride is desired. See 

your dealer for more information. 

Soft

Medium

Firm

56

THE PERFECT FIT

IQ Rear Suspension Adjustments

Limiter Strap Position (Ski Pressure)

Ski pressure is set at the factory to 

deliver the optimum balance 

between ride and handling. If a 

rider prefers more ski pressure for 

improved steering performance, 

adjustments can be made to the 

front limiter straps. Tighten the 

straps to increase ski pressure. 

Loosen the straps to reduce ski 

pressure.
1. Remove the nuts and flat 

washers from the upper limiter 

straps.

2. Relocate the straps to the desired position.
3. Reinstall the nuts and washers. Tighten securely.

Upper

Nuts