2000 Polaris Indy 500 / 600 snowmobile service manual, Page 276Get this manual
SUSPENSION Rear Suspension AdjustmentsXTRA 12 Style Rear Torsion Spring
Rear torsion spring preload is adjusted by turning the two position cams (A) on the short leg of the spring as shown with the engine spark plug toolThis adjustment is easier if the long spring leg is lifted over the roller and replaced after the cam is properly positionedAlways maintain equal adjustment on both sides
A Soft Tension Long End to Front
A Firm Tension (Long End Up)
IFS ADJUSTMENTS
IFS AdjustmentsShims