1979 Ski-Doo Supplementary Shop Manual, Page 51Get this manual
c Maximum: 0.06 mm (.0024")
SECTION 04 SUB-SECTION 01 (ENGINE TOLERANCES MEASUREMENT)
CRANKSHAFT DEFLECTION
With the crankshaft pos iti oned between center lathe, install dial indicator as close as possible to crankshaft blade then measure deflection on each sideIf deflection exceeds 0.06 mm (0024") the crankshaft should be repaired by specia lized shop or it shou ld be replaced
CONNECTING ROD ALIGNMENT
Check if connecting rod is bent as follows:Once engine crankcase is assembled with the piston mounted on connecting rod without its pi ston rings, position cylinder on piston
NOTE: The cylindercrankcase gasket must not be installed