Sprint Filter P14 Air Filter for Dusty Conditions – Honda CB250R (2018–2026) SM219P14

A filtration rating reads like a property of the filter. It is more useful read as a description of everything behind it. The element is the last serviceable point in the intake tract of a CB250R: past it there is a throttle body, a length of ducting, a set of valve seats and a cylinder, and not one of those can be taken out and cleaned on a Saturday morning. Whatever the medium lets through is the entire working diet of those parts for as long as the engine runs. Rating the Sprint Filter P14 SM219P14 at 14 microns is therefore a statement about the list of things the engine has to cope with, and how short that list is.

Key Features

• Made for dusty air, long daily distances and surfaces that were never sealed
• Filtration of 14 microns, airflow figure 1,800 l/m²/sec
• A dry special nonwoven that never carries oil, so nothing migrates onto the sensor or the throttle body
• Filtering surface roughly double what other performance elements offer
• Replaces the standard element directly: nothing modified, nothing remapped, nothing to declare
• Cleaned and reused, backed by two years of warranty from the day of purchase

The one part of the intake you can still service

Everything downstream is judged by what happens upstream. Fine grit does not announce itself: it accumulates on throttle bores and stems where it makes idle behaviour untidy, it works at valve seats, and what reaches the bore leaves with the oil at the next change or stays to circulate until then. None of it can be undone by a later decision. The one place in that chain where an owner still has a choice is the element itself, and it is also the only place where the choice is cheap.

What a rating does and does not promise

A figure like 14 microns describes how much of a given particle size a medium holds back in test conditions, not a guarantee that nothing larger ever gets past. It is a behaviour, not a gate. And it comes at a stated price: the P14 flows 1,800 l/m²/sec where the P08 flows 5,050 at 80 microns, and the T12 goes to 7 microns at 560. Finer retention always spends airflow, which is a trade rather than a ranking. Fitting any of them will not make a standard CB250R measurably quicker. What it gives is an intake restriction that is returned to roughly its starting point by a compressor rather than by a purchase order.

Care and cleaning

Compressed air from the clean side outwards is where every service starts. If the season has been hard on it, wash the element in lukewarm water with a mild detergent, rinse until the water runs clear, and let it dry completely in air — no heat, no flame. Refitting happens dry, with no oiling stage at any point in the element’s life. Sprint Filter’s maintenance sheet is in the Downloads tab.

Fitment & Compatibility

Made for the Honda CB250R from 2018 to 2026. The same element also fits the CB125R, CB150R and CB300R over the same years, four machines in total. The complete list is in the Fitment tab.