The facts.
DescriptionThe whole story▼
Most product names in this category are moods. This one looks like a measurement and is not: the 85 in F1-85 is part of the name, not a micron rating, so setting it against the 80 of the standard weave leads nowhere. Read the whole range by its real figures and it stops resembling a ladder — the F1-85 at 15,000 l/m²/sec, 80 µm at 5,050, 14 µm at 1,800. The racing cloth, woven from polyester threads from 22 µm in diameter, flows the most and in the maker's test also held back more of the 100-micron fraction than the standard weave, 95.22 % against 93.13 %. The specification lives on the data sheet, not in the name.
Key Features
- Dry polyester racing medium, woven from threads of 22 µm diameter upward
- Rated flow 15,000 l/m²/sec, around three times that of the standard P08 weave
- 95.22 % of the 100-micron fraction held in Sprint Filter's comparison measurement
- Roughly double the filter surface of other performance elements, in the unmodified airbox
- Dry from first fitting to last: never oiled, cleaned with compressed air
- Direct fit for the series housing, washable, two years of warranty
Reading the range by its figures
The three media offered for this airbox differ in exactly one variable. Frame, sealing face and fixing are shared, and only the cloth changes, so the entire decision is which pair of numbers suits the riding. A finer cloth holds more and passes less; a more open one passes more and lets a larger share of the fine fraction through. Calling any of the three a better version of the others means ignoring one of its two numbers, which is how this category usually goes wrong.
Where it belongs, and where it does not
A ceiling three times the standard becomes visible only when something presses against it: full throttle held high in the range, repeated often enough that the intake turns into the part under load. On the road that condition does not arrive, so nothing will be felt — a drop-in element does not make a standard motorcycle noticeably stronger, and a more open weave leaves that sentence intact. It is not the answer to dust either, where the range points the other way, to the 14 µm non-woven. This one is bought for sessions rather than for journeys.
Care and cleaning
Cleaned dry, like every medium in the range. Lay an air line on the clean side of the CM196S F1-85 and work outwards until the weave reads evenly against the light. Water with a little mild detergent is for greasy contamination only, followed by a full rinse. Then open air until it is completely dry — no heater, no hot-air gun, no flame, because heat is what ends one of these elements — and refit it untreated. The maintenance sheet is in the Downloads tab.
Fitment & Compatibility
For the Royal Enfield Bear 650 of 2025 and 2026. Two further machines share this airbox and this element: the Continental GT 650 and the Interceptor 650, both listed from 2018 to 2026. Confirm your own year in the Fitment tab before ordering.
DownloadsOwner's manual · brochure▼
FitmentWhich bikes this fits▼
- Royal Enfield Bear (2025–2026)
- Royal Enfield Continental GT (2018–2026)
- Royal Enfield Interceptor (2018–2026)
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