Can the idle speed of a China IV EFI motorcycle be adjusted?

[DelVictoria]

China IV EFI motorcycles can have their idle speed adjusted. Here is the relevant information: 1. Adjustable idle speed: The idle speed adjustment screw is installed on the air passage next to the throttle body. By adjusting the idle speed screw, the amount of intake air is controlled, thereby adjusting the idle speed. 2. Non-adjustable idle speed: Another type is non-adjustable idle speed, which is preset by the computer program. If the idle speed is unstable, it is definitely caused by a vehicle malfunction. Mechanical faults: Valve leakage, negative pressure tube leakage, or injector malfunction causing poor atomization. Injector clogging or fuel leakage leading to an overly lean or rich air-fuel mixture. Excessive fuel pressure causing an overly rich mixture, or insufficient fuel pressure causing an overly lean mixture. Fuel filter clogging, fuel pressure regulator malfunction, etc.