What causes a scooter's throttle to not accelerate smoothly and jerk?

[RosalieAnn]

Scooter throttle not accelerating smoothly and jerking is due to a clogged carburetor. Below are the specific functions of the engine throttle: 1. Control carburetor flow: It regulates the airflow into the carburetor to adjust the air-fuel mixture concentration. Typically located at the bottom, the higher the position, the less air enters. When the weather gets colder, the air-fuel mixture concentration decreases, and adjusting it upward can change the mixture concentration, making the vehicle easier to start. 2. Deliver air-fuel mixture and exhaust gases: The valves are divided into intake and exhaust valves. The intake valve's role is to draw the air-fuel mixture into the cylinder for compression and combustion, while the exhaust valve's function is to expel the burned exhaust gases and dissipate heat.