There was a posting not long ago from one of us who had fixed his by
effectively "potting" it inside a larger PVC fitting.  I've not done it, but
it seems that if the threads are intact, this will fix problems of the end
busting out.

Good luck.

Tom Salicos

>
> I'm also in need of one of those caps. I found one off  of an 81 Westy,
but it won't thread on.  If anyone finds one of these, let me know.  I'll
order one for myself.
>