1974 Ski-Doo Shop Manual, Page 14Get this manual
INSTALLATION Prior to installation, ensure that pulley guard and frame bracket are 90 with frame Warning: No lateral free-play should exist between pulley guard and frame bracketSI ide pulley guard into bracket Pul on lower spring bolt, engage pin into frame bracket and install hair pin cotterNote: If driven pullev guard has been removed, secure it to frame using bolts and nuts