Stripped thread on exhaust stub

[John Roberts]

Well, bugger me.
Took the pipes off my '82 airhead today and to my horror found that one of the threads was stripped on exhaust stub on the head. I mean the one under the finned nut where the pipe comes out. I do know it happens, but I always use Copperslip and slacken them off just a fraction of a turn and retighten them again just to keep them from seizing once a year or so. So I was particularly miffed to find that it had happened to me.

So. My questions are therefore (1)Why me, Lord, why me? and (2)How do I make sure that the other one doesn't seize also?

John