Sprint Filter P08 F1-85 Air Filter for Racing – Honda CB150R (2018–2026) SM219S F1-85

Most CB150Rs are ridden where the air is hot, seasonally wet and thick with traffic dust, and those are the two conditions a racing filter medium handles least well. The P08 F1-85 is the fastest-flowing fabric in the P08 family at 15,000 l/m²/sec, and it buys that by opening the weave to 85 microns instead of the 80 of the standard P08. Coarser filtration is a deliberate step backwards, and on a swept circuit with an engine stripped often it is a reasonable one. In monsoon traffic it is the wrong way round. The SM219S F1-85 is here for owners who race the bike; for everyone else the honest answer sits elsewhere in the same range.

Key Features

• Racing specification: an 85 micron aperture with 15,000 l/m²/sec, the highest flow in this family
• Polyester, run completely dry — an oiled filter has something to give up, this one has not
• More filtering surface than a comparable sports element offers
• A straight exchange for the paper element: the airbox stays as Honda built it, the mapping as it was
• Washed, dried and put back rather than binned at every service interval
• Built to outlast the motorcycle, warranted for two years from the day of purchase

What this bike actually breathes

Two things reach a tropical intake that a circuit does not supply. One is water: road spray, and humidity that a paper element takes in and holds. The other is fine mineral dust from unsealed shoulders, mixed with brake and tyre debris in slow traffic, and it is the small end of that mixture that stays airborne at intake height. Sprint Filter answers each with a different fabric rather than a better one. The P037 is water-repellent polyester at 37 microns and 4,500 l/m²/sec; the P14 goes down to 14 microns at 1,800. Both give up flow to gain retention. That exchange runs in both directions, and the F1-85 is what it looks like at the other end.

Where the racing medium earns its place

Racing is not only a harder duty cycle, it is a far shorter one. A season of sessions puts a small fraction of the air through an element that a year of commuting does, so a wider weave has far less time to matter, and the engine behind it is opened on a schedule that would look absurd on a road bike. Those two facts are what make 85 microns defensible. Neither applies to a CB150R used to get to work. Ridden that way, the P08 is the sensible default, and the P14 the better answer once dust is a daily fact rather than an occasional one.

Care and cleaning

In normal use it is a compressor and nothing else: air fed to the clean side and worked outward, and the SM219S F1-85 back in the airbox dry. Heavier deposits come out with lukewarm water and a mild detergent, rinsed until it runs clear, then left in moving air until it is dry throughout. No hairdryer, no heat gun, no flame. It is never treated with oil. The maintenance sheet from Sprint Filter is in the Downloads tab.

Fitment & Compatibility

Made for the Honda CB150R from 2018 to 2026. This one SM219S F1-85 element serves all four Neo Sports Café singles, 125 through 300; the complete list is in the Fitment tab.