2010-2012 PRO-RIDE RUSH Switchback RMK Service Manual, Page 275Get this manual
Steering and Suspensions Front Track Shock (FTS) Factory Settings
To change the FTS spring preload, carefully tip the snowmobile onto its left side to remove weight from the front track shockGrasp the spring and rotate it
2011-2012 RUSHSWITCHBACKRMK2010 RUSH ASSAULT When decreasing FTS spring preload, make sure at least two turns of preload are holding the spring retainer against the springFailure to do so may cause the retainer to fall out when the shock is fully extendedWhen the snowmobile is not accelerating, Increasing FTS spring preload will decrease ski pressureDecreasing FTS spring preload will increase ski pressureThe compression dampener controls ride comfortqualityTurning the adjuster towards the SOFT setting (counterclockwise) will make the ride quality less harsh, but may cause the FTS to bottom outTurning the adjuster towards the STIFF setting (clockwise) will make the FTS stifferMEASURING PRELOAD