1985 Ski-Doo snowmobile Service Manual, Page 14Get this manual
Section 01 TOOLS Sub-section 02 (SERVICE TOOLS)
Cylinder aligning tools 377,447,503 engines 462 engine 467,532,537 engines
Twin cylinder engines 420 876 171 420876 175 420 876 570
AOOOOO2019
377,503 engines
420 240 275
AOOOOO2020
Cylinder aligning tool