Yeah CM 2929, I think I got it now. For some reason the bike wont idle at a stop. If it will still rev up and you can keep it running with the clutch in, we just need to figure out the idle. FIRST, make very sure the intake to the engine and to the carb is sealed on both ends. You can check for leaks by drizzling water over the connections. While keeping it reved so it don't die, drizzle a little water over them. if there's an air leak it should almost kill the engine. I still don't know if you REALLY tried the idle screw all the way in. The BRASS SCREW with the small spring on the side of your carb is the idle screw. Turn it ALL the way in. That should take the idle TOO high. If you only tried a turn or two it might have not been enough. Also make sure you fuel/oil mix is right. I just use 8oz per gallon of gas on a broke in engine. I'm no math teacher so I don't even TRY to figure out what the heck 50:1 is. I've never seized an engine myself so I guess I'm close enough. On a new engine I throw in an extra oil cap full in the tank to make sure. But too oil rich and the bike will have a hard time running. So the mix has to be close.
Anyway, check this stuff out and get back to me. We'll get it idling one way or another.
Big Red.