Engine: 50-100cc, 2 stroke Application: Motorcycles Venturi diam.: 15 - 16 - 17 - 17,5 - 18 - 19 - 19,5 - 20 - 21mm Features: Piston-type throttle valve Independent starting circuit Idling system with jet and mixture adjusting screw Main circuit with mechanical mixture adjustment by means of a conical needle Connection by insulating reducing socket from Ø 26 to Ø 24-23 for PHBG A-C types and Ø 25 elastic fitting connection for PHBG B and D types Air intake connection Ø 32 and Ø M32 x 1.25 for trumpet or union assembly Material: Die-cast Zamac body