Parts such as the Left Carburetor: Float, Jet Main Size 110, Valve Set,float, Spring Air Screw are included in the Cl72 Scrambler 1962 Usa / 250 Left Carburetor parts fiche.
The most reasonably priced component used on the Cl72 Scrambler 1962 Usa / 250 Left Carburetor is the Spring Air Screw.