Well after 503,000 miles and 145 oil changes I stripped the threads in one of the oilfilter cover holes in the engine block.

I know it's a 6X1mm thread but I don't know if I should use a Helicoil or Time-Sert
to repair the thread.

Has anyone done this repair?

It's the hole that is the most facing the back of the bike which is the easiest to get at. Can still do it in the frame, I think?

Anybody, anybody?