Reasons for Loud Motorcycle Starting Noise
2 Answers
There are many factors that affect motorcycle noise, which can be summarized into the following categories: temperature, speed, load, and lubrication. Temperature: Some engine noises appear as the temperature rises, while others decrease with increasing temperature. Some noises are often accompanied by heating phenomena. Speed: The noise has a certain relationship with the engine speed and the vehicle's driving speed. Load: Load has an impact on noise. Generally, noise increases with the increase in load, which is a common pattern. Lubrication: Regardless of the type of noise, when lubrication conditions are poor, the noise tends to be more severe.
I have a motorcycle that I ride daily, and it makes a loud noise when starting, especially on cold winter mornings. This is mainly because when it's cold, the engine oil hasn't warmed up yet, leading to poor lubrication, so the engine has to work harder, resulting in louder noise. Additionally, there might be an issue with the exhaust system, such as a worn-out or cracked muffler, which lets noise escape. I usually don’t pay much attention to maintenance, so carbon buildup in the exhaust or loose screws can also cause this. Over time, I’ve also noticed that the chain might be too loose or the bearings worn out, causing rattling noises upon startup. Don’t ignore these issues—safety first. It’s recommended to regularly check the muffler and change the engine oil to avoid accidents on the road, and it can also save fuel and reduce noise.
