⟲ 360° — drag meThe facts.
DescriptionThe whole story▼
A filtration figure only applies to the air that goes through the medium. Air that slips past the edge of the element, or under a lid that is not seated, meets neither the racing weave nor the P08's 80 µm cloth — it is not filtered at all. On a bike whose box is opened once a year that is a detail. On an RC 390 it is not: this is the model here most likely to have its bodywork off and its box open several times a season. The P08 F1-85 flows 15,000 litres per square metre per second against the P08's 5,050 and retains 95.22 per cent of 100-micron particles against 93.13, and every one of those numbers assumes a perfect seal.
Key Features
- Dry polyester racing weave of 22 µm-and-up threads, rated 15,000 l/m²/sec
- Sits on the original sealing face in the standard airbox — no adapters, no trimming
- Oil-free, so the sealing edge stays clean and nothing is carried forward
- Roughly double the filtering area of a comparable performance element
- Cleaned with an air line and refitted the same afternoon; two years of warranty
- A racing part — for road use on an RC 390 the P08 is the better specification
The half of the job that is not the medium
Two things filter the air here: the element, and the joint around it. The joint gets no rating printed on a box, and it is the one that suffers from being disturbed. An element refitted slightly proud, a corner trapped under the lid, a clip left unlatched — each opens a path that bypasses the weave, and no medium is fine enough to make up for it. A dry element helps, because the box spends less time open: nothing soaks and nothing waits to dry, so what comes out goes back the same hour.
Which weave the RC 390 should have
A road-registered RC 390 collects most of its distance on public roads, and that is where the racing weave's premium buys least: its extra flow only appears at the very top of the range, and the rest of the time the cheaper P08 does the same job. No drop-in element makes a standard motorcycle faster in any case; the honest benefit common to all of these filters is an intake restriction that starts low and is reset by washing instead of being replaced. If the bike is a road machine that visits circuits, the P08 delivers that for less money. The F1-85 is the specification for one that lives at the circuit.
Care and cleaning
The PM200S F1-85 wants compressed air on its clean face, worked outward, so the load leaves by the side that collected it. When air alone stops clearing it, lukewarm water with a mild detergent will, rinsed until clear. Drying is done in open air and never hurried with heat or a flame, and the element returns to the box only when the weave is dry throughout — then check that the lid seats squarely. The maintenance sheet is in the Downloads tab.
Fitment & Compatibility
For the KTM RC 390, 2022 to 2026, taking the place of the original in the unmodified airbox. Thirteen KTM and Husqvarna machines share this code, the track-only RC 390 R included, so order by the code and the year rather than the model name alone. The list is in the Fitment tab.
DownloadsOwner's manual · brochure▼
FitmentWhich bikes this fits▼
- Husqvarna Svartpilen 125 (2021–2023)
- Husqvarna Svartpilen 200 (2022–2026)
- Husqvarna Svartpilen 250 (2020–2026)
- Husqvarna Svartpilen 401 (2018–2023)
- Husqvarna Vitpilen (2018–2023)
- KTM Duke 125 (2017–2023)
- KTM Duke 200 (2020–2026)
- KTM Adventure 250 (2020–2026)
- KTM Duke 250 (2017–2023)
- KTM Adventure 390 (2020–2023)
- KTM Duke 390 (2017–2023)
- KTM RC 390 (2022–2026)
- KTM RC 390R (2022–2026)
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