1999 Ski-Doo Factory Shop Manual Volume One, Page 311Get this manual
Subsection 03
Section 07 REAR SUSPENSION (SC-10 SPORT AND TOURING SUSPENSIONS)
The longer the belt, the greater will be the track lead angleA shorter belt will reduce track lead angle which may help when negotiating particular snow conditionAdjusting holes on the stopper strap allow to adjust it according to driver's requirements, field andor snow conditions-
CAUTION
Deep Snow Operation When operating the vehicle in deep snow, it may be necessary to change position of adjustment cams, stopper strap andor driver's riding position, to change the angle at which the track rides on the snowOperator's familiarly with the various adjustments as well as snow conditions will dictate the most efficient combination