Zongshen single-cylinder 200 water-cooled engine, why, one from the other?

Throttling carbon deposit. When the four-wheel 200 water-cooled fuel scooter for the elderly starts, especially when the car is cold, the on-off valve is insensitive to rotation due to carbon deposition in the throttle, which affects the inaccurate parameters of the mixture concentration or the sensor can not accurately feed back the servo, resulting in the feeling of automatic start-up, which can be solved by disassembling and cleaning the throttle.