Suspension troubleshooting, Rear suspension set-up – Polaris Trail RMK User Manual

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SUSPENSION TROUBLESHOOTING

Rear Suspension Set-Up

This chart is only a guideline to be used for initial suspension set-up. Your set-up may

vary based on your desired riding style.

Setting Initial Torsion Spring Preload (Sag Method)

To set up the EDGE RMK rear suspension torsion spring preload, measure the distance

between the ground and rear bumper (see illustration). This measurement should be

taken with no rider and the rear suspension at full extension. This measurement, from

the ground to the rear bumper, is dimension “X”.
NOTE: Sag measurements should be taken with suspension moving freely in a warm

shop or after a short warm-up ride. Rear of machine may need to be lifted slightly to

achieve full extension of rear suspension.
Next, have the rider drop down hard on the seat and bounce up and down several times,

working the rear suspension. With the rider seated, measure the distance between the

ground and the rear bumper (at the exact same location used for dimension “X”). This is

dimension “Y”.
To determine sag, commonly referred to as ride-in, subtract dimension Y from dimen-

sion X. Therefore Sag=X-Y. Sag is adjusted by rotating the torsion spring preload cams

located on the rear torque arm (see Fig. 1). The ideal amount of sag for the EDGE RMK

rear suspension is 4

″ (X-Y=4″).

If the rear suspension rides in less than 3

″ or more than 5″ with the torsion spring pre-

load 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 pre-

load may vary based on rider preference and riding conditions.

Optional Torsion Springs

Track

Soft

Standard

Firm

136

Not applicable

7041627-067 7041628-067

.347 77

7041629-067 7041630-067

.359 77

144, 151,

156, 159

7042081-067 7042082-067

.347 47

7042068-067 7042069-067

.359 47

7042079-067 7042080-067

.378 47

Fig. 1

Fig. 2

Fig. 3

Fig. 4

Soft/Low Tension

(Long end to front)

Medium Tension

(Short end up)

High/Firm Tension

(Long end up)

High Position

Standard Position

Low Position

Increase

Decrease