Sprint Filter P08 Air Filter for Road & Track – Suzuki GSX-R125 (2017–2026) PM250S

The GSX-R125 exists because of a licence category. It is styled like the superbike it borrows its name from and bought, in most of Europe, by riders not yet allowed anything larger — so its output is set by regulation, not by its engineering. Worth saying plainly: on a machine capped by law, an air filter has nothing to add, and a part that did would take the bike out of the class it was bought for. The Sprint Filter P08 PM250S is one of the few intake changes that alters nothing on paper: standard airbox, standard position, no remap, nothing visible from outside.

Key Features

• Housing, snorkel and ducting stay untouched; only the element is replaced
• The P08 polyester works dry and is never oiled — no film travels onto the sensors
• It holds at 80 microns and passes 5,050 litres per square metre per second
• The filtering surface is roughly double what other performance filters offer
• Compressed air services it; washable, and back in for another season
• Warranty of two years from the date of purchase

The change that stays invisible

Type approval on a learner-legal machine covers more than output. The airbox is part of the intake noise behaviour and of the water and heat management of the whole tract; changing the element inside it is a smaller order of decision than replacing the box with an open cone. Housing, snorkel, ducting and seal stay as Suzuki built them, and nothing about how the bike is registered, insured or inspected moves. For a rider whose licence depends on the machine still being what the paperwork says, that counts for more than any claim on a filter box.

Where the restriction actually sits

The order of things helps here. Between the outside air and the combustion chamber sit the snorkel, the airbox volume, the throttle body, the calibration and the exhaust, and a small, deliberately restrained engine runs into its calibration long before its filter. The element is the last link in that chain and, on a standard GSX-R125, not the one that decides anything. What it does decide is whether the resistance in month one is still the resistance in month twenty. The P08 is woven from polyester threads of 22 microns and upwards, filters at 80 microns and flows 5,050 litres per square metre per second over roughly double the surface of other performance filters. Finer weaves exist — P037 at 37 microns, P14 at 14 — and each step finer trades flow for retention, the P14 passing 1,800. A trade, not a ranking.

Care and cleaning

The PM250S is serviced from the clean side outwards with compressed air and refitted dry. If that is not enough, lukewarm water with a mild detergent will clean it: rinse until the water runs clear, then dry it completely in open air, away from heat and any flame. The maintenance sheet sits in the Downloads tab.

Fitment & Compatibility

Made for the Suzuki GSX-R125, 2017 to 2026, a direct replacement in the standard airbox with no modification. The same element covers the other small-capacity Suzukis on this airbox plus one machine from another marque; the full list is in the Fitment tab.