Violent 375 nine gas, clutch can't move, high and low rods don't respond, what is the fault?

Weiwei 375 is full of gas, the clutch can't be stepped on, and the high and low levers don't respond. The circuit is out of order.

Generally speaking, there are two main reasons for engine jitter: oil circuit fault and circuit fault. When the vehicle is in use, the dust in the air is mixed with gasoline, which is easy to form sludge at the throttle valve, making the throttle valve no longer accurate in air intake control, resulting in unbalanced mixing ratio, poor combustion and finally engine jitter.

In addition, the nozzle will be blocked and the engine will shake during use; Circuit faults, such as high-voltage coils and spark plugs, may also lead to jitter.