Parts such as the Carburetor (component Parts): Needle,jet, Seat Set,valve, Top Comp., Chamber Set A,flo are included in the Vfr750r Rc30 1989 (k) Canada Carburetor (component Parts) parts fiche.
In this schematic the "Screw,pan" is used most often.
The most expensive part in this assembly is the Piston Comp.,vacu.