Sprint Filter P14 Air Filter for Dusty Conditions – Triumph Bonneville T120 (2017–2026) PM174P14

Every air filter has to answer one question before any other, and it is a fair question: what will I feel? On a standard T120 the honest answer is nothing. No rider has ever detected, through the bars, the difference between an element that holds back particles at 80 microns and one that holds them at 14. It is delivered into the engine over years, in the form of things that never got in. The Sprint Filter P14 PM174P14 is therefore a part bought on a specification rather than on an impression.

Key Features

• Specification first: 14 microns of retention, 1,800 l/m²/sec of air flow
• A filtering surface about double the figure other performance filters reach
• Dry non-woven material with no oil in it, so no film can travel to the throttle bodies or the air sensor
• A drop-in for the standard airbox — nothing modified, nothing remapped, homologation untouched
• An air line from the clean side is all the servicing there is; wash it and use it again
• Designed to last the life of the motorcycle, with two years of warranty from the date of purchase

How to judge a filter when you cannot feel it

Four things about an element can be checked rather than believed. The first is what it retains: 14 microns here, against 80 microns for the standard P08 road medium. The second is what it passes: 1,800 l/m²/sec against the P08's 5,050. Those two move together and always in opposite directions — a finer medium holds back more and flows less. It is a trade, not a league table. The third is whether the restriction stays put between services or climbs steadily. The fourth is whether anything in the filter can end up somewhere else, which is why every medium in this range is dry and none of them is oiled.

What the T120 actually asks for

Panniers, a pillion, a full day of main roads and passes, then the same again tomorrow — the T120 spends more of its life under sustained load than any of the machines it shares this airbox with. Sustained load is not a peak-flow problem; a standard engine on a standard throttle never comes close to the ceiling of either medium. It is a consistency problem. Hours of moving air is what loads an element, so what matters is that the restriction on the last day of a tour is much the same as on the first, and that at the end of it the part can be blown out and put back rather than ordered and waited for. That, and not a power claim, is what the PM174P14 is for. It will not make the bike faster.

Care and cleaning

Compressed air, aimed at the clean side and worked outwards, puts the PM174P14 back to its starting condition; refit it dry. Where it has earned more, use lukewarm water with a mild detergent and rinse for as long as it takes the water to run clear. Then let it dry completely in open air — no heat, no flame, no shortcut. There is no oiling stage to learn or to repeat. The Sprint Filter maintenance sheet sits in the Downloads tab.

Fitment & Compatibility

Made for the Triumph Bonneville T120 from 2017 to 2026. One element serves five machines on this airbox. The complete list is in the Fitment tab.