Sprint Filter P08 F1-85 Air Filter for Racing – Honda CBR600RR (2021–2026) SM262S F1-85

By Sprint Filter's own account, its filters are the most used in MotoGP, Moto3, World Superbike, Supersport and Superstock. That is the manufacturer describing itself, and it is worth naming as such rather than repeating as a measurement. It is also worth noticing which of those names appears here: of all the Hondas in this catalogue, the 600 supersport is the one whose own racing class is on that list. Supersport grids are built out of machines like this one. If a racing cloth is ever going to be in the right airbox, it is this airbox.

Key Features

• 85 µm cloth flowing 15,000 l/m²/sec — the highest rate in the Sprint Filter range
• Close to three times the rated flow of the standard weave listed for the same housing
• Dry polyester throughout, with no oil to be drawn onto a sensor downstream
• Around twice the working surface of a conventional performance element
• Identical fit to the standard element, so the change can be made and unmade at any service
• Cleaned with compressed air and reused, with two years of Sprint Filter warranty

Where the class overlap stops

A shared racing class is not a shared duty cycle. What a cloth rated at 15,000 l/m²/sec is built for is sustained running high in the rev range, lap after lap, where the engine holds itself against whatever the intake will give it. A machine on a national Supersport grid does that for a whole session. A road-registered CBR600RR does it in seconds, between one corner and the next, and then goes back to a throttle opening that asks the material for a fraction of what it can pass. Same model, two regimes that have very little to do with one another.

What the step costs and what it changes

For this housing the racing element is priced at a little over two and a half times the standard one, and exactly one thing is different in return: the specification of the cloth. Nothing else moves. It is not a power part — no drop-in element makes a standard CBR600RR noticeably stronger, and the flow ceiling only becomes visible to an engine that can press against it for long enough to matter. Where that happens, the ceiling is worth having. Where it does not, the standard weave was already past the point of being the limit.

Care and cleaning

Between sessions, compressed air against the clean face is usually the whole job, which is precisely why this material suits a race weekend: it comes back to the same starting condition without a spare in the van. A wash in lukewarm water with mild detergent handles what air leaves behind on the SM262S F1-85. Dry it in moving air only — heat and flame both destroy polyester — and fit it dry, untreated. Sprint Filter's maintenance sheet is in the Downloads tab.

Fitment & Compatibility

Built for the airbox of the Honda CBR600RR of 2021 to 2026, the one machine the catalogue lists against this element. The Fitment tab carries the entry in full.