The facts.
DescriptionThe whole story▼
A Kawasaki Ninja 1000 SX usually reaches the circuit under its own power, does its sessions and rides home the same evening. That is most of the appeal of the bike, and it is also the awkward part of fitting a racing air filter to it. The Sprint Filter PM111S F1-85 uses the P08 F1-85 medium, which passes 15,000 l/m²/sec where the standard P08 fabric passes 5,050 — and it does not buy that air flow with a coarser weave. The 85 is part of the name, not a pore size, and in Sprint Filter's test the racing medium retains 95.22 % of 100-micron particles against 93.13 % for the P08. The element cannot tell the track day from the Monday commute, and it does not need to. What it cannot do is make the four hundred kilometres of road riding either side of two fast laps ask for more air than they do.
Key Features
- A racing medium in dry polyester: threads from 22 µm diameter, 15,000 l/m²/sec
- Against the standard P08 (80 microns, 5,050 l/m²/sec): roughly three times the air, with no retention given up in the manufacturer's test
- Either way the filtering surface is roughly double that of other performance filters
- No oil in it, so nothing sets off downstream towards sensors or throttle bodies
- Original element out, this one in — standard airbox, no modification, no remap
- Washable, reusable, covered for two years from the date of purchase
Two elements, or one compromise
There are only two honest ways to run this medium on a road-registered sport-tourer. The first is to treat it as event equipment: keep the standard element, fit the racing one for the track day, swap it back afterwards and label the one on the shelf. The change is internal and reversible, so nothing is altered permanently. The second is to leave it in all year, which costs no filtration — in Sprint Filter's own test the F1-85 holds back slightly more than the P08 — but pays for a flow ceiling that road riding almost never reaches. Both are defensible. The only mistake is expecting the second to change how the bike feels on the road.
The condition attached to the flow
Racing media are built for engines that are developed, mapped and opened by operating hours, and that is where 15,000 l/m²/sec actually gets drawn on. A Ninja 1000 SX in standard trim, serviced strictly to its road schedule, uses very little of it, and on that bike the standard P08 is simply the better balance. Nothing here promises power, either — a plug-in element can only give back the restriction it caused itself, and on a standard machine that share is small.
Care and cleaning
After a dusty weekend the PM111S F1-85 wants lukewarm water and a mild detergent: rinse until the water runs clear, then open air until it is dry through, never against heat, never near a flame. Otherwise compressed air from the clean side outwards is all it takes. It goes back in dry, and oiling is a step this medium does not have. The maintenance sheet is in the Downloads tab.
Fitment & Compatibility
Made for the Kawasaki Ninja 1000 SX, 2020 to 2026. The same PM111S F1-85 element covers five machines built around this airbox, including the Ninja 1100 SX, the Z1100 and the two Bimota models that share the engine; the complete list is in the Fitment tab.
DownloadsOwner's manual · brochure▼
FitmentWhich bikes this fits▼
- Bimota KB4 (2021–2026)
- Bimota KB4RC (2022–2026)
- Kawasaki Ninja 1000 SX (2020–2026)
- Kawasaki Z1100 (2026)
- Kawasaki Ninja 1100 SX (2025–2026)
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