What does the presence of a baffle in the exhaust system of a motorcycle help achieve?

The presence of a baffle in the exhaust system of a motorcycle is primarily designed to reduce emissions. Baffles create a series of internal chambers or passages that help control the flow of exhaust gases. This moderation promotes more complete combustion of the fuel, which in turn can lead to lower emissions of harmful pollutants. Furthermore, baffles can also help in muffling the sound of the engine, ensuring that it meets noise regulations while also contributing to better environmental compliance.

On the other hand, increasing noise or enhancing performance would typically be associated with removing or modifying baffles, which is contrary to the purpose of their installation. Improving visibility is unrelated to exhaust system components. Therefore, the focus on reducing emissions highlights the critical role baffles play in promoting a more environmentally friendly operation of motorcycles.