Sprint Filter P08 F1-85 Air Filter for Racing – Yamaha XSR 900 GP/ GT (2024–2026) SM272S F1-85

The service schedule that came with the XSR 900 GP or the XSR 900 GT was written around the element Yamaha put in the airbox. Fit a different medium and the schedule stops describing the bike. The Sprint Filter SM272S F1-85 is exactly such a change: the P08 F1-85 filters at 85 microns where the standard P08 sits at 80, and flows 15,000 litres per square metre per second against 5,050. Three times the air, with a coarser weave to get it. The sensible response to that is not a longer interval on the grounds that the element is washable. It is a shorter one.

Key Features

• Dry racing polyester: 85 microns of filtration, 15,000 l/m²/sec of airflow
• Rated coarser than the standard P08 at 80 microns; flow and retention move in opposite directions
• Never carries oil, so nothing is left on the throttle bodies or the sensors
• Close to double the filtering area of a conventional performance element
• Series airbox, series fitting: nothing modified, no remap, homologation untouched
• Regenerated with compressed air instead of replaced, and guaranteed for two years

Why the interval moves the other way

There is an easy mistake available here. A washable element cannot be used up, and one flowing three times as much air shows even less sign of loading than usual, so inspection begins to feel like something that can wait. Both arguments run backwards. The F1-85 gives up retention by design, and the variable left to compensate with is time: the less of it the element spends dirty, the less gets through. On a dry medium that check costs an air line and ten minutes, which is what makes a shorter interval affordable — but it has to be kept, and it is not the figure in the manual.

What a road XSR 900 is up against

Neither of these two is a circuit motorcycle. The GP wears a half fairing and the GT a screen and luggage, and both spend their lives on public roads: winter grit, spring rain, dust off the verges in summer. Sprint Filter has media for precisely that. The P037 is water-repellent, filters at 37 microns and flows 4,500 litres per square metre per second; the standard P08 at 80 microns and 5,050 litres is the general road and track answer. Both hold back more than the F1-85, and both surrender flow that road use is unlikely to call on. The SM272S F1-85 earns its place on this airbox when the bike is on a circuit; it was built for that and not for a commute.

Care and cleaning

Dry from beginning to end: no oil to apply and none to over-apply. An air line pointed at the clean face and worked outwards restores it in most cases. For a heavier load, lukewarm water and a mild detergent, rinsed until nothing further comes out. It then dries in open air until it is dry to the core — heat and flames are ruled out entirely — and is refitted dry. The Sprint Filter maintenance instructions are in the Downloads tab.

Fitment & Compatibility

For the Yamaha XSR 900 GP and XSR 900 GT, 2024 to 2026. The same element covers four listings on this airbox, together with the MT-09 / SP, the R9 and the Tracer 9 / GT; the full list is in the Fitment tab.