Almost all petcocks "leak". The solvents evaporate out leaving solids, "varnish" or "lacquer" as some call it. These solid from gasoline are usually brownish or tan in color. The WD40 doesn't actually lube the petcock, it penetrates and dissolves this residue. A brand new bike's petcock will stick if left in storage or parked long enough.
Every normal man must be tempted, at times, to spit on his hands, hoist the black flag, and begin slitting throats.
H. L. Mencken
| 
