50cc Carburetor tuning for Keihin CVK on a QMB139 Chinese scooter engine

Main jet 0:57 Pilot jet 7:26 Idle 10:00 Needle 11:47 Accelerator pump 13:11 Temperature 13:36 Elevation 3:49 Summary 14:21 Main jet kit: Air filter: Carburetor: This is a complete tutorial showing you how to tune a 50cc Chinese scooter carburetor. I will show you how to select the right jets, check the spark plug, and how to tell if the engine is running too lean