Both a high idle and a low idle can have negative effects on a motorcycle.
A high idle, where the engine is revving at a higher RPM than the recommended range, can result in increased wear and tear on various engine components. It can lead to accelerated engine wear, increased fuel consumption, and potentially overheating. Additionally, a high idle can make it more difficult to shift gears smoothly and can impact overall rideability.
On the other hand, a low idle, where the engine is running at a lower RPM than the recommended range, can also cause issues. It can result in poor engine performance, stalling, and difficulty starting the motorcycle. A low idle can cause insufficient lubrication and reduced charging system output, which may lead to battery draining or poor electrical performance.
It's important to maintain the idle speed within the manufacturer's specified range for optimal performance and longevity of the motorcycle's engine. The recommended idle speed can typically be found in the owner's manual or service documentation provided by the manufacturer.
If you are experiencing issues with the idle speed of your motorcycle, it is advisable to have it inspected and serviced by a qualified mechanic to ensure it is set correctly and operating within the recommended range.