IT'S ALIVE!!!! MUWAHAHAHAHA

I finally got it all back together and it fired right up. So new piston and rings soaked in 2stroke oil a couple days. For now I'm using that other broken tranny part I just filed off the edge of the broken end so it doesn't bite the belt too bad while I got it running and tuned until I get a new/used good one.
Now for carb tuning, it'll start/run fine but if I don't keep just a little throttle down it'll die, with or without choke on and tank in pri or run. Any ideas?
P.S. If you answer to my current prob please tell me how to go about accomplishing it, thanks.