Parts such as the Carburetor Parts: Cap-starter Plunger, Ring-0, Spring,diaphragm Valv, Cap-starter Plunger,r are included in the Zx750a2 Gpz750 1984 Usa California Canada Carburetor Parts parts fiche.
In this schematic the "Screw-pan-ws-cros" is used most often.
The Carburetor Parts assembly is constructed from several parts from which the Diaphragm,valve is the most expensive.