1970-1973 Ski-Doo Snowmobiles Technical Data Manual, Page 30Get this manual
DRIVEN PULLEY SPRING TENSION 1970-71-72-73 MODELS
1970-1971 MODELS
On all models except alpine InvaderValmont To obtain proper tension rotate outer cam clockwise 23 of turn(When facing cam!ON TWO (2) CYLINDER TNT MODELS, spring tensic)fI SllOllld be llib :t libON ALL ALPINE INVADERVALMONT MODEL To obtain proper tension rotate sliding pulley half counter clockwise 23 of turn (when facing outer cam)ON ALPINEVALMONT MODELS, )spring tension should be Ibs :t lb
1972 MODEtS