Sprint Filter P08 Air Filter for Road & Track – Honda NC750X (2021–2026) PM215S

Honda sells this machine with a dual-clutch automatic as well as a manual gearbox, and that detail says more about the intake than it first appears to. Where the rider picks the gear, the engine's operating point is partly a matter of mood, and two owners of the same motorcycle can work it in quite different places. Where a shift map picks it, the operating point is a decision the factory already made, repeated identically every time the conditions repeat. It gives the NC750X about the most predictable air demand of anything here — and a predictable demand is precisely the case where a restriction that stays put beats one that drifts.

Key Features

• One dry layer of woven polyester, oil-free from the first kilometre to the last
• 80 µm filtration and 5,050 l/m²/sec of flow: Sprint Filter's standard road and track cloth
• Thread from ø 22 microns, with the passage a function of the weave rather than of pressed pulp
• Roughly twice the filtering surface of a conventional performance element
• Direct replacement inside the untouched standard airbox — nothing cut, no remap needed
• Cleaned and reused for the life of the motorcycle, with two years of warranty from purchase

Predictable demand, predictable restriction

A paper panel climbs in resistance from the day it is fitted, and it climbs invisibly, because closed-loop fuelling absorbs the change long before a rider could feel it in the throttle. On a motorcycle whose operating point wanders, that drift is mixed in with everything else and effectively unreadable. On one whose operating point is set by a map, the drift is the only thing changing — which makes it worth removing as a variable rather than tolerating it. A washable element does that by returning to its starting condition instead of ratcheting upward between replacements.

The claim worth making, and the one that is not

The claim that is not worth making is power. A drop-in element does not make a standard NC750X noticeably stronger, and the long-stroke twin under the tank storage was never short of air. The claim that holds is duller and more durable: a lower intake resistance that stays close to where it began across a whole service interval, on a part that is serviced rather than bought again — which is entirely in keeping with a motorcycle chosen for exactly that sort of reasoning in the first place.

Care and cleaning

Compressed air, played over the clean face so the dirt travels back out the way it came in, is the whole routine most of the time. After a winter of salt and spray, wash the PM215S in lukewarm water with a little mild detergent and rinse until the water runs clear. Let it dry in open moving air rather than against a heat source, since heat and flame both ruin polyester, and refit it dry and untreated. The Sprint Filter maintenance sheet is in the Downloads tab.

Fitment & Compatibility

Cut for the airbox of the Honda NC750X built from 2021 to 2026. The catalogue lists one machine against this element; the Fitment tab shows it as recorded.