Snowmobile Polaris 340 Transport Trail Touring Deluxe (2008 year). Manual - part 8

32

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 snowcross racing would provide a 

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

tom out harshly on a snowcross course.

See your Polaris dealer for initial suspension setup information. Addi-

tional 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.

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THE PERFECT FIT

Rear Suspension Adjustments

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 setup. 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 

worn rail 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.

NOTE: 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. See page 76.

Track Tension

Track adjustment is critical for proper handling. Always maintain cor-

rect tension and alignment. Refer to the track tension maintenance sec-

tion beginning on page 98.

34

THE PERFECT FIT

EDGE 136 Rear Suspension Adjustments

Initial Spring Preload Setting (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 

full extension. 

NOTE: The rear bumper may need 

to be lifted upward 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 mea-

surement 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. Use the illustration for ref-

erence. 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.

X

Y

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THE PERFECT FIT

EDGE 136 Rear Suspension Adjustments

Rear Spring Tension

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

the engine spark plug tool. Different rate torsion springs are available if 

a firmer ride is desired. See 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.

Low Tension

Medium Tension

High Tension