High-flow gauze filter offers superior engine protection. Reusable. For YFZ450 application you must use GYTR® Billet Air Filter Adaptor Plate (GYT-5TG95-10-00). For YFZ450R/YFZ450X application, you must use GYTR® Billet Air Filter Adaptor Plate (18P-E41E0-V0-00). Service with Genuine Yamaha Gauze Filter Cleaner and Filter Oil, both available from your Yamaha dealer.