The facts.
DescriptionThe whole story▼
Air thins with height, and an engine does not care about volume — it cares about mass. Take an F 900 GS Adventure over a high pass and the cylinders still fill to the same volume on every cycle, but each litre carries less oxygen, the fuelling is trimmed to match and the bike makes less power. What the intake sees on the way up is unchanged in litres per second and lighter in every other respect. It is the one situation in which a filter's flow rating and a rider's experience of altitude touch each other at all.
Key Features
- Woven polyester used dry, with no oil to migrate onto the intake sensors
- A rated 15,000 l/m²/sec through a weave of threads from 22 µm in diameter — a volumetric figure, as all of them are
- Nearly twice the cloth of a comparable performance element, inside the original frame
- Replaces the standard panel directly: no work on the airbox, no remapping
- Regenerated with air, specified to last as long as the motorcycle
- Two years of guarantee running from the purchase date
Litres per second, not grams
Every flow rating in this range is quoted as a volume: litres through a square metre of cloth each second. That is the honest way to describe a medium, because cloth passes volume and knows nothing of density. The engine works the other way round. High up it has to move appreciably more volume to gather the same mass of oxygen, so the demand on the intake, measured in the very units the filter is rated in, rises exactly as the power falls away. The effect is real and it is modest, and the machines that meet it hardest are those ridden loaded across high country — which describes this model's purpose fairly well.
How much of it reaches the rider
Not much, and pretending otherwise would be dishonest. The volumetric increase at touring altitudes is a fraction, the resistance of a clean element of any specification is small, and the engine management adjusts to whatever arrives without asking anyone's permission. Nobody feels a filter on a mountain road. What can be felt eventually is a neglected one: a panel halfway through a hard year, in thin air, under sustained load, is where the intake's own share of the resistance finally becomes a number worth naming. The argument for the racing weave is not the pass, then. It is a pattern of hard use with frequent cleaning, and without that pattern the standard P08 covers this bike properly for a fraction of the price.
Care and cleaning
Service it with a compressor: air onto the clean side of the PM188S F1-85, pushed outward until light comes through the weave again. A wash in warm water with a mild detergent handles what remains after a long, dirty trip; rinse until the water is clear. Then let it dry fully in the open, with no heat and no naked flame anywhere near it, and refit only once it is dry. Sprint Filter's maintenance sheet is in the Downloads tab.
Fitment & Compatibility
Made for the BMW F 900 GS Adventure of 2023 to 2026, seated in the standard airbox. Nine machines take this racing element in total, across the BMW middleweight F family and Kove; they are listed under Fitment.
DownloadsOwner's manual · brochure▼
FitmentWhich bikes this fits▼
- BMW F 750 GS (2017–2026)
- BMW F 800 GS (2023–2026)
- BMW F 850 GS (2017–2026)
- BMW F 850 GS Adventure (2017–2026)
- BMW F 900 GS (2023–2026)
- BMW F 900 GS Adventure (2023–2026)
- BMW F 900 R (2019–2026)
- BMW F 900 XR (2019–2026)
- Kove 800 X Pro (2024–2026)
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Measure your head circumference about one centimetre above your eyebrows and compare it with the size chart on this page. Between sizes? Choose the smaller one — the padding beds in with use.
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Most of our touring and sport helmets are Pinlock-ready and many include the insert. Check the ‘What’s in the box’ section on this page for this model.
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Take out the washable lining and hand-wash it in lukewarm water. Clean the shell and visor with a soft cloth and water only — never solvents.
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