Sprint Filter P08 Air Filter for Road & Track – Honda CBR250RR (2017–2026) PM168S

Every filtration figure ever printed describes a clean element, which is the only state in which a filter can be measured and one it occupies for a vanishingly small share of its life. What a CBR250RR actually runs, on nearly every morning of its ownership, is an element somewhere in the middle of its interval: partly loaded, quietly restricting a little more than it did on the day it went in. That middle state is the honest subject here, because it is the one you own.

Key Features

• Woven dry polyester at an 80 µm aperture, rated 5,050 l/m²/sec — the road and track specification
• Thread from ø 22 microns upward; the aperture is set by the weave, not by pressed fibre
• Around twice the working cloth of a typical performance element
• Regenerated with an air line, so a loaded element is a temporary state rather than a terminal one
• Dry from new and dry after every wash, with no oil to migrate downstream
• Straight exchange in the standard airbox: nothing cut, nothing repositioned, no remap

The half of the interval that never gets quoted

A disposable panel travels in one direction between services. Whatever it has collected stays collected, its restriction climbs across the interval, and the only reset on offer is a new part on a date somebody else chose. A reusable element changes the shape of that curve rather than the physics behind it: the load still builds, but it comes back off whenever the airbox happens to be open. No published measurement compares this medium with an original paper panel, so none is quoted here; the argument is structural rather than numerical.

Why the dirty end matters on a small twin

A quarter-litre sports twin gets worked hard as a matter of routine, where a large machine is asked for everything only now and then. Whatever the intake costs is therefore paid when the engine genuinely wants air, not at part throttle on a dual carriageway. An insert filter does not make a standard motorcycle noticeably stronger and this one will not either; what changes is that the intake's condition becomes something you decide about rather than something counting down to a service date.

Care and cleaning

Compressed air held against the clean face and worked outward covers the PM168S for most of its life; the dirt leaves the way it arrived, which is why direction matters. After a wet or gritty spell, lukewarm water and a little mild washing-up detergent shift what air will not, followed by rinsing until the run-off comes away clear. Leave it in open air until dry right through, away from radiators, hot air guns and flame: heat ruins polyester, and a deformed element seals badly long before it looks wrong. The maintenance sheet is in the Downloads tab.

Fitment & Compatibility

Cut for the airbox of the Honda CBR250RR across model years 2017 to 2026, and that is the whole fitment list: one machine, ten model years, one part number. Two further media are catalogued for the identical housing, the fine P14 for dusty work and the P08 F1-85 racing cloth. The Fitment tab carries the full listing.