1980 Ski-Doo Shop Manual, Page 72Get this manual
SECTION 03 SUB-SECTION 02, (ENGINES)
Because of cap nuts, cylinder studs have to be screwed mto the crankcase so that they do not protrude by more than 82.5 mm (3.250") on exhaust side and 57.5 mm (2.260") on intake side
Piston to wall clearance should be:
TYPE MINIMUM MAXIMUM
0.080 mm (.0031 ") 0.090 mm (0035")
0.180 mm (007") 0.200 mm (008")