Sprint Filter P08 F1-85 Air Filter for Racing – Triumph Street Triple RS/R/S /Moto2 (2017–2026) PM167S F1-85

Four names share this listing and one of them borrows a world championship. Triumph builds the engines for Moto2, and the Street Triple Moto2 Edition takes its name from that arrangement. None of it says anything about what belongs in the airbox. Racing on a side panel is a marketing fact. Racing on the PM167S F1-85 is a specification with two numbers behind it, and the two have no connection to one another.

Key Features

• A single layer of dry polyester, aperture calibrated to 85 µm instead of the standard 80
• 15,000 l/m²/sec of rated flow, the highest figure Sprint Filter publishes for its media
• Dry from end to end: no oil to dose, and none that can migrate onto the intake sensor
• Roughly twice the filtering surface of rival performance elements in the standard box
• Goes into the series airbox unaltered, so the factory calibration is left as it was
• Serviced with compressed air, laid out for the life of the bike, two-year warranty

What the specification says

Two figures separate this element from the standard P08 for the same housing: an aperture of 85 µm rather than 80, and 15,000 l/m²/sec rather than 5,050. Six per cent wider, three times the rated flow. That is the whole of the difference. It is a cloth, not a tune, and cloth is chosen by the conditions it has to work in. A finer medium holds back more and flows less; this one sits at the far end of that scale, and the exchange runs in both directions rather than up a ladder.

The version with the weakest case

Because value follows use, this fitment list produces an awkward result. A 765 RS taken to track days has the strongest claim on a racing weave. A limited edition kept for good weather and modest mileage has the weakest, so the reserve is drawn on least by the machine with the most racing in its name. None of these bikes gains noticeable power from a panel filter, whichever medium is in it. What changes is that the intake resistance is set back to its low starting value at every cleaning instead of rising until the element is discarded. Decide from your riding, not from the badge.

Care and cleaning

Compressed air does the routine work on the PM167S F1-85, blown from the clean side outwards so the dirt leaves the way it arrived. Where road film or salt has left more than dust, warm water with a mild detergent will lift it; rinse until it runs clear. Let it dry in moving air, with no heat source anywhere near it, and refit it dry. Nothing is oiled, before or after. Full instructions are in the Downloads tab.

Fitment & Compatibility

For the Triumph Street Triple 765 in RS, R, S and Moto2 form, listed here from 2017 to 2026. One further listing shares this element, the Street Triple 660S built on the same airbox. Designations changed several times across those years, so check yours in the Fitment tab first.