Sprint Filter P08 F1-85 Air Filter for Racing – Yamaha R9 (2025–2026) SM272S F1-85

Of the four machines sharing this airbox, the R9 is the one that makes the case for a racing filter without any help. It is a supersport, it will spend days on circuits, and circuit air is about the cleanest air a motorcycle ever breathes: swept tarmac, no gravel shoulders no queue of diesels. That environment is what makes the Sprint Filter SM272S F1-85 defensible, because the medium is deliberately coarser than the standard one — 85 microns against 80 — in return for an airflow rating of 15,000 litres per square metre per second where the P08 manages 5,050. The trade is sensible where there is less in the air to catch, and only there.

Key Features

• P08 F1-85 racing polyester, run dry: 15,000 l/m²/sec of airflow at 85 microns of filtration
• A step back from the standard P08 at 80 microns — filtration is the price of the flow
• No oil, no dressing, nothing that can travel downstream onto the intake sensors
• Roughly twice the surface of a typical performance element
• Goes into the series airbox unmodified, with no remap and no effect on homologation
• Washed and reused rather than replaced, under a guarantee that runs two years

A day on track is measured in hours

Service schedules count kilometres, and a track day does not produce many of them. What it produces is load: several hours of high revs and wide throttle openings, in air that also carries rubber dust and the exhaust of thirty other machines. On any bike being properly looked after the element comes out between sessions anyway, and on a dry polyester one that inspection ends with an air line and a refit instead of a spare part. That is the working rhythm the F1-85 was designed around, and it is the only rhythm in which accepting a coarser weave makes sense.

The same R9 on a Tuesday morning

Very few R9s live at a circuit. The same motorcycle rides to work, sits behind lorries and crosses roadworks, and none of the reasoning above survives any of that. Road air carries brake dust, tyre particles and grit, and it carries them at every throttle opening rather than only at full load. An R9 that never sees a track is better served by the standard P08 at 80 microns and 5,050 litres, which gives up no filtration to get there. The F1-85 is the right part for a particular use, and saying so plainly beats selling it as the better filter.

Care and cleaning

The SM272S F1-85 is regenerated dry. An air line held to the clean side, working outwards, returns it to the condition it started in for most services. Where more is called for, use lukewarm water and a mild detergent and rinse until the run-off is clear. Then air-drying, right through to the core, with no heat and no flame involved at any stage, and refitting only when it is completely dry. The maintenance sheet from Sprint Filter sits in the Downloads tab.

Fitment & Compatibility

Made for the Yamaha R9, 2025 to 2026. This element serves four listings built on the same airbox, alongside the MT-09 / SP, the Tracer 9 / GT and the XSR 900 GP/ GT; the complete list is in the Fitment tab.