What is the reason for abnormal engine noise when the motorcycle is not tilted?
1 Answers
Motorcycle abnormal engine noise when not tilted is caused by abnormal piston operation. Normal engine sounds: If the engine is in good technical condition, during idle operation, only a uniform droning sound can be heard. At medium speed operation, the sound is uniform and crisp. During acceleration operation, it emits a powerful and smooth droning sound. These are all normal sounds. Abnormal engine sounds: If during engine operation, sounds similar to piston and cylinder wall collisions are heard, knocking sounds from burned-out bearings, or bubbling sounds from excessive fuel intake in the carburetor, etc., these all belong to abnormal sounds.