1986 Ski-Doo Factory Shop Manual, Page 143Get this manual
Section 02 ENG Sub-section 06 (467 ENGINE TYPE)
INSPECTION
1,5, Rotary valve coverrotary valve
A gap of 0.27 0.48 mm (.011".019") must be maintained between the rotary valve and the crankcaseTo measure this gap use feeler gage inserted between rotary valve and upper crankcase with the rotary valve cover in place without It's O-ringCheck the more surface as possibleFollow the same procedure for the lower