Parts such as the Carburetor: Washer,spg.,4mm, Top Set, Float Set, Valve,set Float are included in the Z50a Mini Trail K7 1976 Usa Carburetor parts fiche.
The Carburetor assembly is constructed from several parts from which the Pa.carb,z50(03a) is the most expensive.
This schematic depicts all components used in the Z50a Mini Trail K7 1976 Usa Carburetor partslist.