What should I do if the throttle surface is not smooth?

If there is only a thin layer of dirt on the accelerator, there is no need to remove it, just wipe it gently with a cloth. If it is necessary to remove the throttle valve before cleaning, first unplug the wire on the side, and then unscrew the screw that fixes the throttle valve, so that the throttle valve can be taken out. Just spray a little cleaning agent on the dirty part of the throttle, and don't wipe it again, because the surface of the throttle is coated. If it is wiped off, the throttle is prone to problems when it is used again.

Throttle is a controllable valve that controls air to enter the engine. After the air enters the intake pipe, it will be mixed with gasoline to form a combustible mixture, and the combustion is successful.