1989 Ski-Doo Repair Manual, Page 75Get this manual
Section 02 ENGINE Sub-section 03 (377 ENGINE TYPE)
INSPECTION
The inspection of the engine top end must include the following measurements:
TOLERANCES MEASUREMENTS FITTING NEW PARTS (MIN (MAX
Centering tool
IP IN 529 0091 00)
WEAR LIMIT
0.08 mm 1.0031") 0.05 mm 1.0020") 0.20 mm (008") 0.20 mm (008") 1.0 mm 1039")
AD01 001 064
Cylinder taper
Cylinder out of round
Cylinder piston cleClrClT1ce Ring piston groove clearClnce Ring end cap
0.08 mm (0031") 0.04 mm 1.002") 0.20 rnm (008")
0.10 mm 10039") 0.11 mm 1004") 0.35 mm (014")