Dirty fuel is the number-one cause of carburetor problems on vintage Hondas. This genuine Honda OEM brass filter screen sits inside the factory Keihin petcock and catches rust, sediment, and debris before they reach the carburetors. Honda's factory service manuals emphasize that when the fuel system is clogged, enough fuel is not fed to the carburetor, the engine does not operate smoothly, and can stall at higher speeds.
The OEM petcock on these vintage Hondas uses a brass mesh screen housed inside the fuel valve body. Fuel passes through this screen on its way from the tank to the carburetors, trapping particles in the sediment cup below. When the screen is intact and clean, it eliminates the need for an inline fuel filter between the petcock and carburetors.
Replace the filter screen if it is torn, corroded, or clogged with debris that cleaning cannot remove. According to the Honda CB200 service manual, periodic maintenance involves positioning the fuel valve to "S" (stop), loosening the filter cap, removing the cap, O-ring, and screen filter, then washing the screen in solvent before reinstalling. If the screen is damaged beyond cleaning, this OEM replacement restores factory filtration.
Does NOT fit the CMC aftermarket replacement petcock. If you need a replacement screen for our aftermarket petcock, find it here.
No. This screen is for the factory Honda Keihin petcock only. The CMC aftermarket petcock uses a different screen.
No. When the OEM brass filter screen is intact and properly installed in the petcock, it provides factory-level filtration and eliminates the need for an external inline filter between the petcock and carburetors.
Install the screen with the small tangs facing down toward the sediment bowl.
Honda's factory service manuals recommend inspecting and cleaning the fuel strainer as part of regular tune-up maintenance. Remove the screen, wash it in solvent, and reinstall. Replace the screen if it is torn or corroded.
Last updated: March 2026
