1972 Ski-Doo Shop Manual, Page 182Get this manual
2-0804 8Inspect gudgeon pinUse the following procedure: (a) If colour of gudgeon pin is brown or blue (burned), replace pin(sl and needle cage(s)(b) Slide your fingers along gudgeon pin to locate possible wearReplace gudgeon pin(s) and needle cage(s) as required(c) Jnsert the gudgeon pin (s) into cold piston(s) and inspect for noticeable radial clearance of the gudgeon pin in the piston eyesIf clearance is no.ticed, replace gudgeon pin(s) and needle cage(s)
CLEANINGINSPECTION in the cylinderShould the piston bear against the side of the cylinder (P.T.Oside or Magneto side), the connecting rod is bent (fig2-8-9)In such case, figure 2-8-10 indicates the correct way of readjusting the rod11Check connecting rod axial play by mea suring the distance between connecting rod and crankshaft blade (fig2-8-11)The tolerance should not be above .040 inchIf clearance is above the specified tolerance the crankshaft should be changed