The RFX Air Filter, part number FXAF 50001 55NO, is manufactured by Multi Air for dependable filtration and precise fitment on select youth motocross motorcycles. Designed for riders of all experience levels, this replacement filter helps protect the engine from dirt and debris while supporting consistent airflow during riding and racing.
Featuring breathable, twin-layer foam, the RFX filter provides effective filtration without restricting engine performance. The foam construction is washable and reusable when properly serviced, making it a practical choice for routine maintenance and demanding off-road conditions. Multi Air brings more than 30 years of air-filter manufacturing experience to the RFX range.
This RFX filter fits 2009–2017 KTM 50 SX models and the 2017 Husqvarna TC 50. Verify the motorcycle year and model before installation to ensure proper fitment. The manufacturer is Multi Air, the brand is RFX, and the vendor part number is FXAF 50001 55NO.
Features:
- Breathable twin-layer foam helps provide reliable dirt filtration and airflow.
- Nonflammable foam construction is used on applicable four-stroke models.
- Precision fitment supports straightforward installation on compatible motorcycles.
- Washable and reusable design helps simplify regular air-filter maintenance.
- Fits 2009–2017 KTM 50 SX and 2017 Husqvarna TC 50 models.
Fitment:
2009 KTM 50 SX
2010 KTM 50 SX
2011 KTM 50 SX
2012 KTM 50 SX
2013 KTM 50 SX
2014 KTM 50 SX
2015 KTM 50 SX
2016 KTM 50 SX
2017 Husqvarna TC 50
2017 KTM 50 SX
2018 Husqvarna TC 50
2018 KTM 50 SX
2019 Husqvarna TC 50
2019 KTM 50 SX
2020 Husqvarna TC 50
2020 KTM 50 SX
2021 Gas-Gas MC 50
2021 Husqvarna TC 50
2021 KTM 50 SX
2022 Gas-Gas MC 50
2022 Husqvarna TC 50
2022 KTM 50 SX
2023 Gas-Gas MC 50
2023 Husqvarna TC 50
2023 KTM 50 SX