This CARBURETOR assembly utilises eight Screw-washer,4x16(s) - the highest specified component.
The most reasonably priced component used on the Cx500 1981 (b) General Export / Kph Carburetor is the Screw-washer,5x16.
Some items from this specific schematic: Carburetor Assy,l, Float Set, Screw Set B, Jet,main,112.