Carburetor (CVK,19mm); GY50, QMB139 Used on Baja, JMstar, Jonway, Lance, NST, Peace, Roketa, Sunl, Tank, TNG, Vento, VIP and many others High quality 19mm CVK replacement carburetor for all GY6 4-stroke 139QMB 49/50cc Chinese engines. Features: Accelerator pump, electric choke (2-pin male plug), fuel and drain lines, fuel filter and quick-drain valve Pre-tuned jetting for most applications 19mm CVK carburetor