On this parts fiche the Guide,valve(outer is the most specified component.
Parts such as the Cylinder Head: Head Assy,cyln, Bolt,flange,6x45, Band C,insulator, Joint,boost are included in the Cbr900rr 1995 (s) Usa California Cylinder Head parts fiche.
The Cylinder Head assembly is constructed from several parts from which the Head Assy,cyln is the most expensive.