Why does my moped drive at a low speed when the accelerator is released? It can either slide or keep running like this without braking! What's going on here?

1, the throttle cable is most likely not to go back. Maybe there is something dirty in the cable, which is blocked too tightly, or maybe the return spring is not strong enough, only half a year. The former is more likely. Just replace the corresponding accessories, which should be very cheap.

2. If it can be determined that the throttle cable has returned, then the only thing that can be saved is the position of the idle throttle screw. Just adjust the speed. Idle throttle screw is unlikely to be damaged, and the possibility of automatic adjustment is very small.

3. Generally speaking, the above two questions are relatively simple. However, generally, friends with poor hands-on ability are not advised to repair it themselves or send it to a mechanic.