Parts such as the Carburetor: Screw,pan 4x8, O-ring,1.3x4.3, Plate,set, Screw Set are included in the Cb250p 1996 (t) Poland / Plr Carburetor parts fiche.
The Carburetor assembly is constructed from several parts from which the Carburetor Assy is the most expensive.
The lowest price component in this Carburetor parts-list fiche is the Screw,pan 4x14.