In general, motorcycles do not necessarily get quieter as they get older. The noise level of a motorcycle can depend on various factors, including the design of the exhaust system, the condition of the muffler, and any modifications made to the bike. However, over time, some components of a motorcycle's exhaust system can wear out or deteriorate, potentially leading to increased noise levels.
If a motorcycle becomes noticeably louder over time, it could be an indication of a problem or wear in the exhaust system. For example, a damaged or rusted muffler or exhaust pipe may result in increased noise. In such cases, it is advisable to have the motorcycle inspected by a qualified mechanic to identify and address the source of the increased noise.
Additionally, certain modifications, such as aftermarket exhaust systems or removal of noise-reducing components, can make a motorcycle louder. These modifications may be chosen by some riders for performance or aesthetic reasons, but they can also result in increased noise levels.
It's important to note that noise regulations vary by jurisdiction, and motorcycles must often comply with certain noise limits to meet legal requirements. If you have concerns about the noise level of your motorcycle, it's a good idea to consult your local laws and regulations to ensure compliance and maintain a considerate approach towards noise pollution.