The facts.
DescriptionThe whole story▼
The usual advice about the F1-85 is easy to give and usually right: its 15,000 l/m²/sec only matter if the engine ever asks for that much air, and a road bike almost never does. The ZH2 makes the advice harder. Air demand on a supercharged engine is not set by displacement and revs alone — the compressor raises the mass of air swallowed at a given engine speed, and the panel feeding it feels the difference. So the flow half of this element's specification is less rhetorical here than on a naturally aspirated naked. The other half has not moved at all, and that is where the decision sits.
Key Features
- Dry woven polyester in the F1-85 racing specification, used without oil of any kind
- Polyester threads from 22 µm across, flowing 15,000 l/m²/sec — the highest flow rate published
- Measured retention of 95.22 % of 100-micron particles, compared with 93.13 % for the P08
- Roughly double the filtering area of other performance elements
- Fits the unmodified series airbox in the paper panel's place — no cutting, no remap
- Cleaned with compressed air and refitted; two years of warranty from purchase
Where the flow argument gains ground
A medium's flow rating is a ceiling per unit of area and time, and ceilings only matter when demand approaches them. That is why the racing cloth is pointless on most road machines: they never get near it. Forced induction moves the demand curve upward rather than merely rightward, so the ZH2 arrives closer to the question than its displacement suggests. Even so: the PM197S F1-85 will not make a series ZH2 noticeably stronger, because a filter cannot give an engine more than the restriction it took away.
Where it loses ground again
The same machine argues against the choice with equal force. The care a high-flow racing weave asks for is owed in every week the bike runs, commuting included, while the flow it buys is collected only in the moments of full demand. A racing specification also assumes a racing rhythm of inspection — the element blown through between sessions, not once a year with the valve clearances. For a ZH2 ridden on roads and serviced annually, the P08 at 80 microns and 5,050 l/m²/sec is the better setting of the same trade.
Care and cleaning
Dry servicing throughout: an air line held against the clean face and directed outwards restores the cloth in normal use. If a wet track day or a salted road has loaded it more heavily, wash it in lukewarm water with a little mild detergent, rinse until the water runs clear and let it dry completely in moving air — never with heat, never over a flame. Refit it dry with the seal sitting evenly. The maintenance sheet is in the Downloads tab.
Fitment & Compatibility
Listed for the Kawasaki ZH2 built from 2020 to 2026, the only machine on this code; the single fitment entry appears under the Fitment tab. The airbox is catalogued with the P08 and the 7-micron T12 as well, so the whole span of the range is available for one motorcycle: a line of settings, not a ladder of quality.
DownloadsOwner's manual · brochure▼
FitmentWhich bikes this fits▼
- Kawasaki ZH2 (2020–2026)
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