What should I do if the motorcycle has a big throttle?

How to solve the problem of large throttle of motorcycle;

If the idle speed cannot be lowered by adjusting the idle speed screw, check whether the throttle and oil needle of the carburetor are stuck and cannot be lowered, or whether the throttle (vacuum carburetor) cannot be closed;

Whether the throttle line and throttle handle are stuck, whether the mixing ratio is wrong or whether the carburetor itself is damaged.