I’m not sure what’s going on with this bolt. It doesn’t appear stripped to me but I can’t get it off of an Última carb.

Any tips or tricks??

 

Is it turning?

 

No

 

Maybe someone put loctite on it, try a little heat with a heat gun, use a six point socket.

 

If memory serves those thread into a steel insert in the heads, find a spare 6 point socket with the mouth ground flat taking the curve off so it will seat deeper on the short shoulder.

 

This, right here. Grind the face of a good SIX POINT socket as flat as possible, don't use a 12 point, and lean into it! Put as much pressure as you can straight into it to keep the socket straight and flush while turning.

 

super + 1 on the 6 pt.
steel insert, hummmmmm, haven't seen it but never say never
there are two issues
1. iron/steel and aluminum are dissimilar metals and they will cause electrolysis which fuses them together
2. the assy was over torqued and now there is a failure in the head material and when you try and back it out, thread locks.