1972 Ski-Doo Shop Manual, Page 41Get this manual
1-06-02 pulls against the pulley halvesthe sliding pulley half opens against the loaded spring and the rotating belt pressure forces the pulley shaft to rotateAn opposite reaction is caused during power cut-down or under torque load(f) Driven pulley shaftshaft on which the Operation of pulleys and drive belt under torque load(One side of belt under tension)
TORQUE CONVERTER
outer pulley half is fixed and connected to drive chain by means of sprocket incorporated within the chain case(g) Drive chainan encased chain linked over sprockets affixed to the driven pulley shaft and drive axle