Power problem revisited (with audio!)

[VTXorcist]

Ok, I posted about this a while back but wasn't able to make any headway. My GZ, especially when I start out, has some serious power issues. If i twist the throttle, the engine revs very unevenly. If I twist too much, it dies out and will stall if I don't let off some. I thought it was only when I was in certain gears, but then I started playing with the throttle while in neutral and noticed it's just a rev issue.

I took the pipes off the bike just to make sure the problem wasn't related to my leaky exhaust (which I'm very aware of). Unfortunately, it isn't related; same thing happens. I used the computer to record me revving the bike while it's in neutral. It's very choppy and almost dies out at the beginning. I kept the throttle on steady the whole recording except for when it almost stalled; I had to let up a bit to keep it from dying.

Anyone have any ideas about my next step? If I can't fix it myself, I'm probably just going to sell it. I already have more money into this bike than I wanted.

Thanks so much for all the advice so far and any you can give me on this issue, too!