The secondary air filter, typically in the form of a sponge or foam, serves to filter the air that enters the scooter's air intake system. While the primary air filter is responsible for filtering out larger particles, the secondary air filter further refines the air by capturing smaller particles and potentially reducing noise.
While the secondary air filter can provide some benefits, its absence is unlikely to cause significant damage to the scooter's engine. The primary air filter should still be in place to provide adequate filtration for the incoming air. However, the absence of the secondary air filter may result in slightly increased noise levels and potentially reduced air filtration efficiency.
If you have recently serviced your scooter and discovered that the secondary air filter and its cover are missing, it is advisable to replace them. The secondary air filter helps in maintaining optimal air quality and minimizing the risk of debris or contaminants entering the engine. Reinstalling the missing secondary air filter and cover will help ensure that the air entering the engine is properly filtered.
If you are unsure about the specific part and its installation, it is recommended to consult the owner's manual or seek guidance from a professional mechanic or authorized service center for your scooter's brand. They can provide you with the correct part and assist you in properly installing it to ensure optimal performance and longevity of your scooter's engine.