Ok. Little update. Finally got some main jets and time to install a set. I bought 147.5s and 145s. Installed the 147.5s yesterday and ran out of time to test drive it. Had to leave for work. I just took the bike for a ride and it still does the same thing and I really feel that it is worse. Having a hard time understanding how/why there is no improvement. Seeing as I went down 2 jet sizes. Gonna let the bike cool down to pull the plugs and check the color of them before I head to bed for work. I will install and try out the 145s. But after what I seen with the 147.5s my hopes aren't high.
I think your concentrating on the wrong circuit. The off idle and mid range seem to be issues. 147.5 mains should be fine. Maybe better with 145's, but not an issue at 3-5k. All slides are moving freely? Diaphragms in good shape and in the groove correctly. Slides aren't previously drilled out? I'm wondering if the bike had a different set of carbs, or a removed stage 1-7 kit, shortly before you bought it?