In my crazy quest to get the /6 up to my standards so that I can sell it (I have an expensive problem wherein I don't feel comfortable selling a bike that needs work), I decided to do a light rebuild of the petcocks. They were rebuilt maybe 5 years ago by a previous owner with new rubber bits, but he didn't do anything about the straws, all 4 of which were broken near the bases and clogged with crap. I need to replace the straws (will source some new copper piping from a hobby shop) but meantime, I need to figure out how to get the small parts of them which are still stuck in the petcocks, out. They almost feel glued in. Is it just corrosion of some sort holding them into the petcock, or am I up against some sort of actual adhesive? Thanks!