But it is not a clean gas tank, it has debris which is clogging the filter. Why not clear the filter and let the crude settle to the bottom of the tank? This happens in all gas tanks regardless of what kind of filter is in use, sand, rust, paint, etc., all sink and settle. And this modification is intended for riders in third world conditions where gas is often purchased from soda bottles that were filled from old oil drums. It is a solution that works. The tank can be flushed out at the end of the year or end of the ride. In my early years with dirt bikes I would clean the petcock screens when they clogged and reinstalled. I didn't bother to flush the tank because it did not make any practical difference, the screen worked and I might clear it again the next season.