I just ran a tap through mine when it stripped on my F6B seat.
Then I bought the tapered bolts from Wing Stuff.
Never been an issue again.
Thanks for responding!
I didn't have an 8mm x 1.25 tap, but I did try running a spare M8 bolt (that had enough threads) through it from the back to the front. When I put the seat back on and tried to (gently, by hand) thread the seat bolt back in (with the rear bolt already started) -- it did the same thing again (went in about four or five turns and then jammed to a stop).
The sense I had was the first four or five outboard threads were complete thrashed and, even though I could straighten them out by threading from the rear, they didn't have enough strength to keep the bolt in the right position when threading from outside in. So at that point I was convinced some type of insert was needed (and not having any knowledge on the subject).
Googling, for the most part seemed to focus on three options: 1) some type of Loctite compound 2) Helicoil inserts and, 3) Time-Sert inserts.
I've probably got enough OCD for three people, and figured I wanted to "fix it right the first time". I suspect options 1 and 2 might have worked quite well for awhile (maybe even the life of the bike while I owned it), but my non-educated, and non-experienced, but (usually pretty) intuitive sense was the Time-Sert option would leave me with the most durable repair (probably better than OEM since the threads are no longer aluminum). If that was true, I was willing to spend a bit more to do it since it was a brand-new bike.