1972 Ski-Doo Shop Manual, Page 36Get this manual
105-01 Suspension
GENERAL INSTALLATION OF TRACK INSERT(S)
The track has three (3) main functions:
(i) to provide cushioning action to surface
1Tilt vehicle on its side to expose the track notches and place Insert into positionNOTE: On T'NT models, ensure the larger edge of track insert is toward inside of track