Petcock Fuel Filter Screen (OEM)

Description

OEM Petcock Fuel Filter Screen | Honda Twins & Singles

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. The general principle is 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.

Why You Need This

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. 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.

Specifications

Replaces OEM	16957-028-000, 16957-011-000, 16957-028-004
Material	Brass mesh (genuine Honda)
Fits Models	CT90 (1966–1977), CB100/CL100 (1970–1975), CB125/CL125 (1973–1978), CB175/CL175/SL175 (1968–1973), CB200/CL200 (1973–1976), CB350/CL350/SL350 (1968–1973), CB360/CL360/CJ360 (1974–1977), CB450/CL450 (1965–1974), CB500T (1975–1976)
Fits Petcock	Factory Keihin OEM petcock only (not CMC aftermarket)
Qty	Sold individually

Does NOT fit the CMC aftermarket replacement petcock. If you need a replacement screen for our aftermarket petcock, find it here.

Installation

1. Turn the fuel valve to the OFF position and disconnect the fuel line.
2. Remove the sediment bowl from the bottom of the petcock body.
3. Remove the old filter screen.
4. Clean all petcock parts thoroughly before reassembly.
5. Install the new brass filter screen with the small tangs facing down toward the sediment bowl.
6. Reassemble the petcock.

Frequently Asked Questions

Does this filter screen fit the CMC aftermarket petcock?

No. This screen is for the factory Honda Keihin petcock only. The CMC aftermarket petcock uses a different screen.

Do I still need an inline fuel filter if I use this 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.

Which way do the tangs face during installation?

Install the screen with the small tangs facing down toward the sediment bowl.

How often should I clean the fuel filter screen?

We 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.

You Might Also Need

• OEM Petcock Rebuild Kit — all the gaskets, O-rings, and seals to rebuild your factory fuel valve
• CMC Aftermarket Petcock — replace the whole unit if your OEM petcock is beyond repair

Last updated: March 2026