Parts such as the Carburetor: Plunger Starter, Nozzle, Main, Seal, Body, Float Chamber are included in the Tt250 1982 (c) Usa Carburetor parts fiche.
This schematic depicts all components used in the Tt250 1982 (c) Usa Carburetor partslist.
The Carburetor assembly is constructed from several parts from which the Carburetor Assy 1 is the most expensive.