Sprint Filter P14 Air Filter for Dusty Conditions – Kawasaki ZX-25R (2020–2026) PM164P14

A finer weave passes less air per unit of area — the P14 flows 1,800 l/m²/sec against the 5,050 of the standard P08 — so the obvious question on a Kawasaki ZX-25R is whether a 249 cc four that revs as hard as this one can afford it. The answer turns on the word area. Sprint Filter builds this element with roughly double the filtering surface of other performance filters, and area is the term that multiplies the flow figure. A fine medium across a large surface and a coarse medium across a small one are not the comparison most people imagine they are making; the element has to be judged as a whole, not by the fabric alone.

Key Features

• Never oiled — the medium is dry, and no film can reach four sets of throttle bodies or the intake sensors
• Filtering surface roughly double that of other performance filters — the figure the flow has to be read against
• Dry non-woven fabric filtering to 14 microns at an air flow of 1,800 l/m²/sec
• Washable and reusable; compressed air from the clean side is the entire service
• Two years of warranty, on an element built to last the life of the motorcycle
• The standard airbox takes it directly: nothing modified, nothing remapped

Where the trade still costs something

Honesty requires the other half. Even with generous area, the P14 is the retention end of the range and the ZX-25R is the machine in this family that spends most of its time near the top of the rev band, where intake demand is highest. If the bike is used on track, or has had its intake path opened up, the standard P08 is the better balance and the P08 F1-85 racing medium better again. The P14 earns its place on a ZX-25R that lives on dusty public roads, where what gets past the filter is the more pressing question than what gets through it.

Four small tracts, one shared element

The other reason area matters here is that this engine draws through four intake tracts rather than two, in quick succession at very high frequency. The element does not see four separate demands, it sees a nearly continuous one, which is exactly the condition in which a partially loaded filter shows up first. Keeping the PM164P14 clean is therefore not a seasonal nicety on this bike; it is the difference between an intake that behaves the same at the end of an interval as at the beginning. It is not a power part, and nobody should buy it as one.

Care and cleaning

Compressed air is the whole routine: from the clean side, directed outwards, and back in dry. On dusty roads that is worth doing more often, not less — a fine medium collects more and collects it sooner. A deeper clean means lukewarm water with a mild detergent and a rinse until the water runs clear, followed by a full air dry. Heat and flame are never part of it, and neither is oil, before the wash or after. The Sprint Filter maintenance sheet is in the Downloads tab.

Fitment & Compatibility

Made for the Kawasaki ZX-25R from 2020 to 2026. The same PM164P14 element covers eleven machines sharing this airbox design; the complete list is in the Fitment tab.