The most reasonably priced component used on the Ex500a7 1993 Usa California Canada Carburetor Parts is the Screw-pan-cros.
Some items from this specific schematic: Spring,vacuum Valve, Spring,pirot Adj Scrw, Plug,pilot Air Screw,, Cap-starter Plunger.
The Carburetor Parts assembly is constructed from several parts from which the Valve,vacuum is the most expensive.