The most expensive part in this assembly is the Head,r,cylinder.
Parts such as the Right Cylinder Head: Screw,cross 5x8, Head,r,cylinder, Stud, 6x55, Joint, Breather are included in the Cx500c Custom 1981 (b) England Right Cylinder Head parts fiche.
The twenty Cx500c Custom 1981 (b) England Right Cylinder Head component parts are all listed in this schematic.