This Piston,vacuum is the most expensive of the items that make up this Carburetor Comp. Parts assembly.
Parts such as the Carburetor Comp. Parts: Spring, Jet,#128, Chamber Set,float, Jet,main(#138) are included in the Vf750c Magna 1983 (d) Usa Carburetor Comp. Parts parts fiche.
In this schematic the "Screw,cross,4x10" is used most often.