Jaguar Power Sports Hoca QMB139 Performance CVK Carburetor Hoca High Performance 26mm CVK Carburetor for 50cc 4-stroke QMB139 engines. Includes electric choke and accelerator pump. Inner Diameter (intake): 26mm Outer Diameter (air filter mount): 42mm Electric Choke (plug style): 2-pin, male Accelerator Pump Main Jet: #102 SlowJet: #35