1980 Ski-Doo Shop Manual, Page 112Get this manual
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SECTION 03 SUB-SECTION 02, (ENGINES)
7234 Rotary valve shaft Oil seal Ball beanng Shim 0.5 mm Distance sleeves 24.5 mm "Loctite 71(redhigh strength) Shim 05 mm O'nng Gear Spring Spring se