YAMAHA AEROX 155 AIR FILTER COVER The Yamaha Aerox 155 Air Filter Cover is another aftermarket part designed to enhance the performance and appearance of the Yamaha Aerox 155 scooter. The air filter cover helps protect the air filter from debris and contaminants while maintaining proper airflow into the engine. A well-designed air filter cover also contributes to smoother engine operation, better air intake, and potentially improved overall performance. In some cases, riders opt for aftermarket air filter covers that are made from materials like carbon fiber or aluminum for added durability, aesthetics, or lightweight performance. These upgraded covers might also help optimize airflow, which can slightly improve throttle response and fuel efficiency.