Polaris 2000 Universal Snowmobile User Manual

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SUSPENSION

SUSPENSION COUPLING

On all Polaris snowmobile rear suspensions there are two torque arms that control

the movement of the rail beam. Prior to the advent of “Suspension Coupling”, these

torque arms could move independently of each other. Rear suspension “coupling”

links the movement of the front and rear torque arms to each other, much like an

anti-roll bar links the left hand and right hand front suspension skis to each other.

There are two types of rear suspension coupling.

REAR TO FRONT COUPLING AND THE REAR REAR SCIS-

SOR STOP (RRSS)

The Rear Rear scissor Stop (RRSS) couples the movement of the rear torque arm

to the front torque arm.
The RRSS limits the amount of independent movement between the rear torque

and the front torque arm.
When landing on the rear of the suspension, the rear torque arm compresses. The

RRSS links that movement to the front torque arm, causing it to compress, borrow-

ing shock and spring damping from the front torque arm, reducing the possibility

of bottoming out.

FRONT TO REAR COUPLING AND THE FRONT REAR SCIS-

SOR STOP (FRSS)

The Front Rear Scissor Stop (FRSS) couples the movement of the front torque arm

to the rear torque arm.
The FRSS limits the amount of independence between the movement of the front

torque arm tot he rear torque arm.
When hitting a bump, the front torque arm starts to compress. the FRSS links that

movement to the rear torque arm, causing it to compress and raise the rear sus-

pension up as one, only allowing the suspension to hit the bump once, eliminating

kickback.

TRADEOFFS

All suspension designs involve a compromise or tradeoff. For example, a suspen-

sion set-up for snowcross racing applications would ride very stiff on the trail. A

suspension set-up for trail riding would bottom out harshly on a snowcross course.

The same compromise holds true for the scissor stop locations.

FRONT REAR SCISSOR STOP (FRSS) - ATTRIBUTES

Moving the FRSS to a higher position or rearward hole will have the following af-

fects on the suspension:
D

Slightly limit overall suspension travel.

Snow mobility will be slightly reduced.

Chatter bump ride will improve.

Bottoming out of the front torque arm will be reduced.

Secondary bump kick back will be reduced.