1986 Ski-Doo Factory Shop Manual, Page 119Get this manual
Section 02 ENGINE Sub-section 05 1462 ENGINE TYPE)
From top edge of magneto side inlet pori, mark crankcase at 51 Q,
INSPECTION
25,28, Rotary valve, rotary valve cover
A gap of .27.48 mm (0.011"0.019' ') must be maintain between the rotary valve and the crankcase,
To measure this gap use feeler gauge inserted between
rotary valve and upper crankcase with rotary valve cover in place, without its a-ringCheck the most surface pqssible, Follow the same procedure with the lower
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To correctly install the rotary valve disc proceed as follows:
- Turning crankshaft counterclockwise, (driVe pulley side) bring magneto side piston to Top Dead Center usmg T.D,C gauge or crankshaft locking tool PIN