The facts.
DescriptionThe whole story▼
Nobody publishes a service interval for a washable air filter, so owners work one out for themselves — two inspections, a note of what the element looked like, and after that a rhythm. That rhythm is calibrated to one particular quantity of material. Fit this part number, which the catalogue credits with a hundred per cent more filtering surface than the standard-size version, and the rhythm you built is no longer describing the same object.
Key Features
- Special non-woven polyester, run dry, with a filtration rating of 14 microns
- Twice the filtering area of the standard-size element for the same housing
- 1,800 l/m²/sec rated flow — a property of the material, identical on both versions
- Oil-free at every stage, so nothing can be lifted off it and deposited downstream
- A straight exchange for the factory element; the airbox and the mapping stay as they are
- Cleaned with compressed air and used again, backed by two years of warranty
Re-learning the rhythm
The honest answer is that you cannot simply double your old interval and walk away, because loading is not the only clock running. Standing time counts, wet seasons count, and a mat going twice as long between services also spends twice as long in the box collecting whatever gets in there while the machine is parked. What the doubled area reliably changes is the point at which resistance starts to climb; what it does not change is the value of looking. Two inspections at your old interval will show what the element is doing at half load, and the new rhythm is written from those.
Why a fourteen-micron mat is hard to read
Because it hides its condition. A woven cloth shows its load against the light; a bonded mat holds fine material in its depth and can be well into its life while still looking serviceable. That is the argument for a fixed routine rather than an impression, and it applies with more force here, since a larger element takes longer to give any visual sign at all. None of this is a power matter — an element inside an untouched airbox leaves a standard R 1200 RS exactly as strong as it was — but a filter whose state you cannot see is one you inspect on the calendar instead of on a hunch.
Care and cleaning
Work from the clean side outwards with an air line and keep the pressure moderate; the aim is to walk the load back out of the fibres, not to force it through them. A wash follows when air alone has stopped returning the mat towards its original resistance: tepid water, a small quantity of mild detergent, and rinsing continued until the run-off comes away colourless. Drying is done in circulating air and nowhere near warmth of any kind, because heat is what ends a polyester element. The K142P14 goes back in dry and unoiled. Its maintenance sheet sits under Downloads.
Fitment & Compatibility
For the BMW R 1200 RS built from 2015 to 2018, in the series airbox with nothing altered. Six machines are listed for this element — the road boxers of both generations, three of the 1200 series and three of the 1250 — and the Fitment tab gives the years for each.
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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