The facts.
DescriptionThe whole story▼
Two things are usually said to change when a P08 F1-85 goes into a Honda CB125R, and only one of them actually does. The medium passes 15,000 l/m²/sec where the standard P08 passes 5,050. The other supposed change, a coarser cloth read off the name, is not real: the 85 is no pore size, and in the manufacturer's test the F1-85 retains 95.22 % of 100-micron particles to the P08's 93.13 %. On this machine the extra air has nowhere to go: an A1 single is built and type-approved to a fixed output, and its standard intake was never the thing holding it there. An uncertain gain that costs nothing in filtration, only money, is the honest shape of this purchase, and it is why the SM219S F1-85 suits a CB125R that races and very few that do not.
Key Features
- P08 F1-85 racing medium: polyester threads from 22 µm diameter, 15,000 l/m²/sec of airflow
- Dry polyester end to end, so there is nothing that could travel downstream onto a sensor
- Considerably more media area than a conventional performance element of the same size
- Fits the series airbox exactly as supplied; nothing is cut and no remap follows
- Serviced with a compressor rather than thrown away, and refitted dry
- Meant to stay with the motorcycle for its whole life, with two years of cover from purchase
The side of the trade that pays
Flow is worth buying when something downstream is asking for it. On a race-prepared CB125R with a freer exhaust, its own fuelling and an engine stripped on a schedule counted in hours, the intake can become the narrow point near peak revs, and a fabric rated at three times the flow is a real answer. On a standard bike it is capacity nobody has ordered. The 125 makes the output its class permits whatever sits in the airbox, and Honda specified the original element with margin already in hand.
What the road rider is paying for
On the road the F1-85 costs nothing in protection — its weave is not coarser than the P08's, whatever the name implies — but it is money spent on a capacity a standard CB125R never reaches. The two halves of this purchase run on different clocks: the benefit only appears under conditions a standard CB125R never meets, while the price is paid once, at the counter. Ridden on the road, this bike is better served by the P08 at 80 microns and 5,050 l/m²/sec, and where the roads are dusty by the P14, which goes down to 14 microns and gives up flow to get there.
Care and cleaning
Compressed air does most of the work: apply it to the clean face and push the dirt back out the way it arrived, then refit the SM219S F1-85 dry. When a season leaves more behind than air will shift, lukewarm water with a mild detergent finishes the job, rinsed until it runs clear and left to dry in open air, never against a heater or over a flame. Oil plays no part at any stage. The Sprint Filter maintenance sheet is in the Downloads tab.
Fitment & Compatibility
Made for the Honda CB125R from 2018 to 2026. The same SM219S F1-85 element covers four machines in the Neo Sports Café range, from the 125 through to the 300; the complete list is in the Fitment tab.
DownloadsOwner's manual · brochure▼
FitmentWhich bikes this fits▼
- Honda CB125R (2018–2026)
- Honda CB150R (2018–2026)
- Honda CB250R (2018–2026)
- Honda CB300R (2018–2026)
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