"Will start and run just above an idle, can get a couple hundred rpm out of it but thatís it."
"I assume, with the thickness of the bearing gone, thatís why my throttle response is gone?"
You ASSUME backwards.
Spring pulls carburetor butterfly towards "open".
As speed increases, the governor weights acting on the sleeve next to them, then the bearing, which moves the yoke it contacts, attempt to move the carburetor butterfly in the "close" direction to contain speed.
You could take that bearing out and throw it away, and sleeve next to it, and the engine would "overspeed", NOT fail to rev up, as your initial complain indicates.
While you obviously need to replace the bearing, there's something else wrong.
Do the governor weights move freely, pushing the sleeve next to the bearing towards the end of the shat as they move outwards, and allowing it to move back inwards as the wights are "collapsed"?