Frame indention ?

The U bolts would snap before that. Maybe a crash?

Again what I was hinting at, thinking how tight an engine mount or swing arm spindle goes - in weaker non tube box section, compared to a midget M6 U bolt... finding one of these that hasn't been crashed and likely rebuilt more than once is quite rare now.

Today I have all the questions but no answers. :side: interesting thread, keep it rolling.

Early 90s KXs had some weird fragile frames would crack like glass. Ive welded a few , ran them on mx tracks, big jumps, etc....not going to be a problem welding/blending that frame.

Welding around a tube like that is not the most ideal thing to do,I wonder if you could weld a pin into the center of the dent and pull out on it by warming the tube up just a little?

I'd be talking to someone about sleeving that spot and filling somehow.

I'm not a welder so don't know if any of the other advice is sound, but sleeving the area, using a larger diameter tube fitted around that area, and welded on, would brace that up well.
Maybe overkill, and would not look original.

I thought of sleeveing it but decided not to.
Out for powder coat already.