A quick look-see showed a nice contact line on the taper.  Not perfect, but you can’t expect more given what the carb body has been subjected to.  I got no way to clean up the seat in the body.

After thorough cleaning and blow-out, I put it back together and installed it on the bike.  The carb runs fine.  Note that the mixture screw can control the idle mixture smoothly.  I suspect that it was more like an on/off switch with the bogus screw since the tapered tip was so small that it couldn’t throttle flow.

https://www.youtube.com/watch?v=fKIl_bczY24

ThumperLife, go ahead and order the new needle jet and slide needle.  For these two parts, no aftermarket stuff, OEM parts are mandatory.  Use the information I previously provided.

The aftermarket carb kit should be here in a week or two.  Amazon already shipped it.  If we are lucky, the TEV diaphragm will be a keeper.  If not, no big deal.  It seems to be working ok as-is.