1985 Ski-Doo snowmobile Service Manual, Page 172Get this manual
Section 02 ENGINE SUb-section 08 (532 ENGINE TYPE)
NOTE: The rotary valve is asymmetrical, therefore at assembly try positioning each side of it on gear to determine best installation
Using angle finder, mark crankcase at 132 from bottom edge of magneto side inlet port
Rotary valve cover mark (ridge I
Magneto side piston must be at TOe
A013002028
A01 300202'
Installation on spare crankcase without mark (ridge)
From top edge of magneto side inlet port, mark crankcase at 52 0