The facts.
DescriptionThe whole story▼
Read this element's fitment list expecting the usual thing and it surprises you. A dust medium ought, by reputation, to belong to the machines that leave the tarmac; not one GS appears on it. The six names are all road boxers — R, RS and RT in both generations — and the RT among them is the heaviest, most faired and most road-bound of the lot. The list is worth taking seriously, because it says something true about where dust actually comes from.
Key Features
- Dry special non-woven polyester with a rating of 14 microns
- Filtering surface doubled against the standard-size element, as recorded in the catalogue
- Rated at 1,800 l/m²/sec of material where the standard cloth carries 5,050
- Never oiled, so there is no film to migrate onto the intake sensors
- Seats in the unmodified series airbox in place of the original panel, with no remap
- Regenerated at the compressor for the life of the machine; two years of guarantee
Where the dust is
Behind lorries, on roadworks, along field edges at harvest, in the grit left by a winter of salting, and in the fine material hanging over any dry city in August. That is a road inventory, not a trail one, and a machine covering long annual distances on sealed surfaces meets more of it in a year than a weekend trail bike does. The RT's own habits make the point: it is used for distance, in traffic, in every month of the year, and it draws its air from whatever is happening twenty metres ahead.
What the extra area answers
Exposure of that kind is not intense, it is continuous — and continuous loading is precisely what capacity is for. A mat with twice the surface takes twice as much of the year's fine material before its resistance starts to climb, at the identical fourteen-micron rating and the identical rated flow per square metre. Nothing about what it catches has moved. Nor has anything about what the motorcycle makes: an element inside a standard airbox does not make a standard R 1200 RT noticeably stronger, whatever its size. It simply carries the same protection further into the season.
Care and cleaning
Compressed air does the work, aimed at the engine-facing surface and driven outwards so that the load departs by the route it took getting in. Long road use tends to leave a film that air will not shift, and that is what the sink is for: hand-warm water, a little mild detergent, then rinsing until nothing more comes out. The element must be bone dry before it goes back — dried in moving air only, with no heat gun, no oven and no flame at any point — and the K142P14 is refitted with nothing applied to it. Sprint Filter's servicing sheet is under Downloads.
Fitment & Compatibility
Made for the BMW R 1200 RT of 2014 to 2018, seated in the standard housing without modification. Six machines share this part number and none of them is a GS: the R, RS and RT of the 1200 generation and their 1250 successors, each listed with its years in the Fitment tab.
DownloadsOwner's manual · brochure▼
FitmentWhich bikes this fits▼
- BMW R 1200 R (2014–2018)
- BMW R 1200 RS (2015–2018)
- BMW R 1200 RT (2014–2018)
- BMW R 1250 R (2019–2023)
- BMW R 1250 RS (2019–2023)
- BMW R 1250 RT (2019–2023)
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