What sound does a worn motorcycle camshaft make?
2 Answers
The sound of a worn camshaft is: clear at idle speed, obvious at medium speed, and the sound changes from chaotic to weakened or even disappears at high speed, which can be identified as camshaft noise. When the engine runs at medium speed, the sound is obvious, with a heavy ticking noise that can also be heard at idle speed and may disappear at high speed, indicating abnormal noise due to camshaft wear. The following are the causes of abnormal camshaft noise: 1. Excessive clearance between the camshaft and its bushings. 2. Rotation of the camshaft bushing. 3. Bending deformation of the camshaft. 4. Excessive axial clearance of the camshaft. 5. Burning or detachment of the camshaft bushing alloy.
As an experienced motorcyclist, I remember the sound of a worn camshaft being all too obvious. It's a repetitive clicking or metallic knocking noise, usually louder at medium to high engine RPMs, like someone is hammering metal inside the engine. The sound comes from increased friction in the components controlling valve operation, caused by insufficient oil lubrication leading to direct metal-on-metal wear. If left unrepaired, it may also be accompanied by unstable idling or power loss. This noise is particularly harsh and more noticeable during night rides, serving as a warning sign for the bike's overall health. I recommend promptly visiting a repair shop to check, replace the camshaft, and ensure sufficient oil levels, preventing a minor issue from turning into a major overhaul that costs more and delays riding enjoyment. Developing a habit of regular maintenance can prevent this, and listening to the engine sound is one way to protect your beloved bike.
