The facts.
DescriptionThe whole story▼
One reason this change asks for no remap is also the reason it cannot be felt. A fuel-injected 150 cc single runs closed loop across most of its ordinary operating range: the oxygen sensor reports what the mixture actually did, and the engine management trims injection to hold target. A small change in the volume of air arriving is absorbed within seconds, without a fault code and without anything a rider could notice. The Sprint Filter P08 F1-85 passes 15,000 litres per square metre per second where the standard P08 passes 5,050, and on a standard Jupiter MX the control system's job is to make that difference disappear.
Key Features
- The standard airbox takes it as it stands — no modification, no remap, homologation unchanged
- Dry polyester for competition: threads from 22 µm diameter, 15,000 l/m²/sec
- No coarser than the standard P08's 80 microns, whatever the name suggests — stated rather than hidden
- Unoiled, so no film can reach the throttle body or the sensors
- Roughly double the filtering surface of other performance filters
- Washable and reusable; warranty of two years from purchase
Closed loop cuts both ways
The convenience is real: nothing to declare, no map to buy, and the airbox, the intake tract and the stored calibration all stay as they left the factory. But the same mechanism that makes the swap harmless makes it invisible — a control system that corrects for small differences in air will correct for this one too. A drop-in element inside an untouched airbox cannot make a production motorcycle noticeably stronger, and anyone describing one as a power part is describing a graph a rider will never feel. The claim it supports is narrower: a low intake resistance that stays low across the service interval instead of climbing quietly.
Where the trim runs out
Many systems hand over to the stored map at wide-open throttle, and that is the only region in which a difference in element flow could show at all. On a standard 150 cc single it still does not, because the element is not what limits the intake there. There is no other half to weigh against it: the F1-85 filters no coarser than the P08 — the 85 is a name, not a pore size — so nothing is lost in traffic either. The argument is simply that nothing is gained. PM186S F1-85 belongs on a machine built to live at the top of the rev range; a road-going Jupiter MX is better served by the P08 at 80 microns and 5,050, or by the P14 at 14 microns and 1,800 when dust is the problem.
Care and cleaning
Compressed air from the clean side outwards is the routine. If that leaves something behind, lukewarm water and a mild detergent will shift it; rinse until the water runs clear. Dry it completely in open air — no heat, no flame — and refit dry. No oiling follows; the polyester never had any. The Downloads tab carries the maintenance sheet.
Fitment & Compatibility
Made for the Yamaha Jupiter MX, 2015 to 2026, and a direct replacement in the standard airbox. The same element is listed for six model names across that period; the list is in the Fitment tab.
DownloadsOwner's manual · brochure▼
FitmentWhich bikes this fits▼
- Yamaha T-150 (2015–2026)
- Yamaha Exciter (2015–2026)
- Yamaha Jupiter MX (2015–2026)
- Yamaha MX King (2015–2026)
- Yamaha Sniper MXi (2015–2026)
- Yamaha Y15ZR/LC150 (2015–2026)
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