I got a cap that was jammed.
After driving the cylinder out.
I made a replacement out of aluminum.
I still have to machine the pegs on the backside.
And another problem is how to keep it in.

old_rider wrote on 10/19/14 at 00:13:12:

Hmmm... not a bad idea.

LOL, going outside to see what mine looks like from the inside, and to see how easy it is to remove.
I personally don't worry about gas being stolen from my bike, its stored in the garage and never left alone for very long.
When I park it, I always leave it in view of a building window, hoping thieves won't go thru my two unlocked side bags (they only have crappy tool set and some fix a flat at present).
Maybe you could shape that top like a gear, so it would be easier to grip and turn with gloves on.

Machined the pins on the back and assembled.
a little tuff to assemble but once it's together, works great.