The facts.
DescriptionThe whole story▼
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 where the Sprint Filter SM272S F1-85 belongs: an airflow rating of 15,000 litres per square metre per second where the P08 manages 5,050, and — whatever the 85 in its name suggests — no coarser a weave than the standard one. According to Sprint Filter it is the most widely used filter in MotoGP, WorldSBK, Supersport and Superstock, which is the company an R9 keeps on a track day.
Key Features
- P08 F1-85 racing polyester, run dry: 15,000 l/m²/sec of airflow through threads from 22 µm diameter
- No step back from the standard P08 at 80 microns — filtration is not 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 the one in which its flow is actually put to use.
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 little of the reasoning above survives any of that. Road air carries brake dust, tyre particles and grit at every throttle opening, and full load is rare. An R9 that never sees a track is well served by the standard P08 at 80 microns and 5,050 litres, and gives up nothing by staying with it. 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.
DownloadsOwner's manual · brochure▼
FitmentWhich bikes this fits▼
- Yamaha MT-09 / SP (2024–2026)
- Yamaha R9 (2025–2026)
- Yamaha Tracer 9 / GT (2025–2026)
- Yamaha XSR 900 GP/ GT (2024–2026)
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