Pwk Performance 51 mm Air Filter
These high flow oiled cotton gauze air filters have a 51mm opening and clamp so that they can be clamped directly to 24mm, 26mm, 28mm, or 30mm PWK carburetors without needing any extra adapters.
It is highly recommended that you oil these filters with filter oil before first use, and if used in very dusty environments, LIKE ON A DIRT TRACK, you should run these with an additional filter sock to keep dirt out of the carburetor and engine.
Do not confuse these with the smaller cheaper filters on other sites, these are larger and flow more air even with dirt in the pleats, and the filter media does not spin around the base like most of the cheaper elements.