The RFX FXAF 40004 55PO Pre-Oiled Air Filter is manufactured by Multi Air for reliable engine air filtration and precise fitment on select Yamaha dirt bikes. Designed for riders of all experience levels, this replacement filter uses breathable twin-layer foam to help protect the engine from dirt and debris while supporting consistent airflow.
The filter is pre-oiled for convenient installation and is made with nonflammable foam for compatible four-stroke applications. Multi Air brings more than 30 years of air filtration experience to the RFX range, providing a dependable replacement option for routine maintenance, racing preparation, and off-road riding.
Fitment includes 2014–2017 Yamaha YZ250F models, 2014–2017 Yamaha YZ450F models, and 2011–2012 Yamaha WR250F models. Verify the motorcycle model and year before ordering to ensure proper fitment. Brand: RFX. Manufacturer: Multi Air. Manufacturer part number: FXAF 40004 55PO. Vendor part number: FXAF 40004 55PO.
Features:
- Pre-oiled foam filter for convenient installation
- Breathable twin-layer foam supports consistent airflow and engine protection
- Nonflammable foam construction for compatible four-stroke models
- Precise fitment for select Yamaha YZ250F, YZ450F, and WR250F motorcycles
- Manufactured by Multi Air for the RFX range
- Manufacturer part number: FXAF 40004 55PO
- Vendor part number: FXAF 40004 55PO
Fitment:
2010 Yamaha WR250F
2011 Yamaha WR250F
2012 Yamaha WR250F
2013 Yamaha WR250F
2014 Yamaha WR250F
2014 Yamaha YZ250F
2014 Yamaha YZ450F
2015 Yamaha WR250F
2015 Yamaha YZ250F
2015 Yamaha YZ450F
2016 Yamaha WR250F
2016 Yamaha YZ250F
2016 Yamaha YZ450F
2017 Yamaha WR250F
2017 Yamaha YZ250F
2017 Yamaha YZ450F
2018 Yamaha WR250F
2018 Yamaha YZ250F
2019 Yamaha WR250F