The RFX Multi Air Air Filter, part number FXAF 40005 55NO, is designed to provide dependable air filtration and precise fitment for select Yamaha off-road motorcycles. Manufactured by Multi Air and supplied under the RFX brand, this replacement filter is a practical choice for riders who need consistent engine protection and reliable airflow during motocross, trail, and other demanding riding conditions.
Built with breathable twin-layered foam, the filter helps capture dirt and debris while supporting the airflow required for strong engine performance. Nonflammable foam is used for all four-stroke applications, providing a durable construction suited to regular riding and maintenance schedules. The RFX Multi Air filter is engineered as a direct-fit replacement, helping simplify installation without modifications.
Fitment includes the 2018 Yamaha YZ450F; 2019 Yamaha YZ250F and YZ450F; 2020 Yamaha YZ250F, YZ450F, and WR250F; 2021 Yamaha YZ250F, YZ450F, and WR250F; and 2022 Yamaha YZ250F. Verify the motorcycle year and model before ordering to ensure correct application. With more than 30 years of air-filter manufacturing experience behind the Multi Air name, this RFX replacement filter delivers dependable filtration for a broad range of Yamaha four-stroke motorcycles.
Features:
- Brand: RFX
- Manufacturer: Multi Air
- Part Number: FXAF 40005 55NO
- Product Type: Replacement air filter
- Construction: Breathable twin-layered foam
- Material: Nonflammable foam for four-stroke applications
- Fitment: 2018 Yamaha YZ450F; 2019 Yamaha YZ250F and YZ450F; 2020 Yamaha YZ250F, YZ450F, and WR250F; 2021 Yamaha YZ250F, YZ450F, and WR250F; 2022 Yamaha YZ250F
Fitment:
2018 Yamaha YZ450F
2019 Yamaha YZ250F
2019 Yamaha YZ450F
2020 Yamaha WR250F
2020 Yamaha YZ250F
2020 Yamaha YZ450F
2021 Yamaha WR250F
2021 Yamaha YZ250F
2021 Yamaha YZ450F
2022 Yamaha WR250F
2022 Yamaha YZ250F
2022 Yamaha YZ450F
2023 Yamaha WR250F
2023 Yamaha YZ250F
2024 Yamaha WR250F
2025 Yamaha WR250F
2026 Yamaha WR250F