1984 Ski-Doo Shop Manual, Page 148Get this manual
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SECTION 02 ENGINE SUB-SECTION 07 (534 ENGINE TYPE)
(15 ftlbs)
7 Rorary valve cover 2bor MB 20(B) 3 Lockwasher mm (4) 4"0" ring 5 Rorary valve 6 Circlip 7 Rorary valve shafr BSeal 9