On this parts fiche the Gasket,cyln.side (mca) is the most specified component.
fifteen components are shown in this Cr250r Elsinore 1986 (g) European Direct Sales / Cmf Gasket Kit exploded diagram.
Some items from this specific schematic: Gasket,cylin Up L (mca), Gasket,ex.flange (mca), Gasket,cyln Head (mca), Gasket,reed Valve (mca).