1974 Ski-Doo Shop Manual, Page 36Get this manual
PULLEY ALIGNMENT
Remove pulley guard and drive beltCheck tightness of engine mount nutsNuts must be torqued to 22-30 ftlb
OFFSET ADJUSTMENT
Fixed Type Driven Pulley Insert correct diameter simulator rod between driven pulley halves(See Technical Data)Using rope, check that drive and driven pulley inner halves are in line
If drive pulley is too far out, twin track models excepted; add shim(s) between frame and chaincaseOn twin trllck models, check tightness of gear box attaching boltsIf necessary remove shim(s) tram crankshaft
Note: On vehicles equipped with aluminum chaincase always use fuUlength shims
Shim(s) added
between frame
and chai ncase