Why does the motorcycle's RPM automatically increase?

[GraceFitz]

The throttle return spring of the carburetor is weak and cannot fully close the throttle valve. The user should replace the carburetor throttle. Idle speed: Exceeding the specified range, for example, if the engine's maximum speed is 6000r/min. The idle speed should be around 1300r/min, and any idle speed exceeding 1300r/min is considered too high. An excessively high idle speed not only affects the driver's operation but also increases fuel consumption and accelerates the wear of transmission components. Inspection: Check whether the throttle valve can fully close. That is, manually pull the throttle to see if it can close further, and if the idle speed can be reduced. Inspect whether the spring and throttle cable are functioning properly, and whether the throttle valve is loose. Adjust or replace the parts in time. Additionally, check for any air leaks promptly.