1999 Ski-Doo Factory Shop Manual Volume Two, Page 224Get this manual
Subsection 05
Section 05 TRANSMISSION (PULLEY DISTANCE AND ALIGNMENT)
S-Series
Pulley Distance Adjustment Method
Engine Movement The engine support has slotted mounting holesMove engine to obtain specified distance between pulleys
Pulley Alignment Method
Driven Pulley Movement When engine slotted mounting holes do not allow to set proper pulley offset X, adjust with shims (PN 504 108 200) between pulley and countershaft bearing support (pulley pushed toward brake disc)Engine Movement Loosen the bolts retaining engine support to the framePosition engine to obtain the specified alignmentNOTE: After alignment, adjust torque rod so it slightly contacts stopper plateDo not over tighten, it will disalign pulleys1