Some items from this specific schematic: Gasket,cylin.head (mca), O Ring,35.5x3, O-ring,78.3x2, Packing,tappet (nas).
The Gasket Kit 1 is made up of components including this Gasket Kit A which is the most expensive.
This part-list fiche shows all the components that make up the Cb250rs 1980 (a) England Gasket Kit 1 .