Sprint Filter P14 Air Filter for Dusty Conditions – Zontes ZT 310-X (2021–2023) SM277P14

A flow rating reads like a steady figure: so many litres through a square metre every second, as though air moved in one continuous stream. An engine never asks for that. It asks in pulses — a run of separate draws, each over in a fraction of a second, with nothing happening in between. Peak velocity through the medium during those draws sits far above the average, and it is the peak a rated figure has to survive.

Key Features

• Rated at 14 microns of filtration with 1,800 litres per square metre per second of flow
• Dry special nonwoven medium — no oil, no dressing, nothing applied before or after cleaning
• Roughly twice the filtering area of the usual performance element, which is what carries a low flow rating
• Fits the ZT 310-X airbox in place of the standard panel, without modification or remapping
• Cleaned with an air line and used again rather than bought again
• Two years of warranty from purchase, with a service life specified as the motorcycle's own

Averages hide the peaks

Between one intake event and the next, the medium is doing nothing at all. During the event it has to pass a cylinder's worth of air in a few thousandths of a second. Averaged over a minute the demand looks modest; measured at the moment it arrives, it is anything but. A medium that flows less has less margin at precisely those moments, and that is the real reason a flow figure belongs in a specification — not because an engine runs short of air on average, but because the peaks are where restriction turns into a pressure drop.

Why the area figure sits beside the flow figure

Rated flow is quoted per square metre, so it describes the material rather than the finished panel. What a housing actually passes is that rate multiplied by however much medium has been folded into it, and Sprint Filter puts roughly double the area of an ordinary performance element in there. More surface means lower velocity through the material for the same demand, which flattens exactly the peaks described above. None of it makes a standard ZT 310-X faster — a slot-in filter does not do that, and a fine medium gives up headroom rather than finding any. It is simply what makes 14 microns usable on a road motorcycle.

Care and cleaning

Compressed air on the clean face, worked outward, covers a normal service. Greasy deposits come off under lukewarm water with a mild detergent and a rinse until the water is clear. Drying is done by air movement at ambient temperature and by nothing else — no flame, no oven, no hot air — and the SM277P14 returns to the airbox dry and bare. The maintenance sheet is under the Downloads tab.

Fitment & Compatibility

For the Zontes ZT 310-X of 2021 to 2023. This code is shared with eight more Zontes machines, five of them 350s, and the fitment list runs from 2019 to 2026. Confirm the year before ordering.