In this schematic the "Bolt Head Cover" is used most often.
Parts such as the Cylinder Head Cover: Gasket,head Cover (nas), Rubber,mount, Plate Comp,breath, Cover Comp.,cylin are included in the Cbr500f 1989 (k) Mexico Cylinder Head Cover parts fiche.
The most reasonably priced component used on the Cbr500f 1989 (k) Mexico Cylinder Head Cover is the Bolt Head Cover.
