Sprint Filter P14 Air Filter for Dusty Conditions – Honda ADV350 (2021–2026) SM222P14

On a geared machine the dustiest moments are usually the slowest ones, and slow normally means the engine is barely breathing. An automatic breaks that link. Crawling up a loose track or picking across a gravel car park, an ADV350 can be moving at walking pace with the engine well up in its range, drawing air at a rate the road speed gives no hint of. The dust is at its thickest and the intake at its busiest in the same moment, which is the whole case for a fine medium on this particular machine.

Key Features

• Dry nonwoven polyester at 14 µm, rated 1,800 l/m²/sec
• The finest medium Sprint Filter catalogues for this airbox
• Holds particles through the depth of the mat rather than at a single face
• The exchange stated plainly: more retention, less flow, and the same in reverse
• Fits the standard housing with no modification and no remapping
• Washable and reusable, with two years of guarantee from purchase

Where an adventure-styled scooter meets its dust

Not usually on the open road. It is the arriving that does it: forest car parks, farm tracks, gravel drives, the unmade last stretch to a trailhead, a building site detour in a dry August. An ADV350 is bought partly because it will take those surfaces, and it is used accordingly, which puts its intake in air that a commuter scooter never meets. That air is also the kind that punishes a coarse medium, because the fraction still hanging at head height long after the vehicle in front has gone is the fine fraction.

What the P14 is, and what it is not

It is not an off-road specification. Sprint Filter's extreme medium, the T12 at 7 µm, is not catalogued for this housing at all, so the finest thing available for an ADV350 is the mat described here — an honest limit rather than a gap to argue around. Within it the trade runs as always: roughly a third of the standard element's flow rating, in exchange for far finer material. None of that is a power claim, because an insert filter does not make a standard machine noticeably stronger and a fine one gives capacity back rather than taking any. On swept tarmac the standard P08 remains the better match.

Care and cleaning

The SM222P14 is serviced by removal alone. Compressed air at the clean face, pushed outward, lifts the load back out the way it arrived; where a dusty spell has packed in more than air can shift, lukewarm water and a mild washing-up detergent take the remainder, rinsed until the run-off is colourless. Then leave it in moving air until it is dry through, and keep radiators, hot air guns and flame well away, because heat distorts the material and a distorted element stops sealing long before it stops looking usable. The maintenance sheet is in the Downloads tab.

Fitment & Compatibility

Catalogued for the Honda ADV350 of model years 2021 through 2026, a single machine on the fitment list. The same housing also takes the standard P08 and the P08 F1-85 racing cloth, so the airbox stays constant and only the material is chosen. Details in the Fitment tab.