2007-2008 Polaris IQ Snowmobiles Service Manual, Page 213Get this manual
Steering and Suspensions ADJUSTMENT PROCEDURES
SETUP AND ADJUSTMENTS
Spring preload is the amount of pressure at which the spring is heldThe longer the installed length of the spring, the less the amount of preload; the shorter the installed length of the spring, the more the amount of preloadAn increase in IFS shock spring preload will result in an increase in ski pressureTo adjust front spring preload on threaded adjust models, grasp the spring and turn in clockwise direction (as viewed from the top of the shock) to increase the preloadTurn in counterclockwise direction to decrease preloadAlways set the preload equally between the right and left-side shocksFor the best ride the spring preload should be as low as possibleSet the preload to use the full travel of the ski shock with occasional light bottoming
Alignment Bar Specifications
DIAMETER: .623"-.625" (15.824-15.875mm) LENGTH: 45" (114.3cm) MATERIAL: C-1018