1972 Ski-Doo Shop Manual, Page 62Get this manual

TRANSMISSION OFFSET ADJUSTMENT If pulley offset is less than 12 132 inch, ins pect frame, gear box bottom plate and engine mounts for wear, damage, secureness of mount ing, distortion andor missing partsRepair or replace defective part(s)If offset between drive puJ ley is greater than specification, adjust as follows:

• ATV
• Jet Ski
• Outboard Motors
• Personal Watercraft
• Snowmobiles
• Stern Drives