Carb rebuild now won't start

[azr]

Carb syncher. I'm going to set the fuel mixture and the air mixture screws by the "best run" method (I think that's what it's called) tomorrow and see how much better it'll run. Right now it's running a bit rough.

[azr]

I tried the best run method with not much sucess. I pulled the carbs and re bench synched them (felt I got it bang on this time). Tried setting the air and fuel mixture screw by best run but couldn't get a decent idle. The carbs are making a "popping" noise. I'm sure it has to do with the mixture screws and the fact I haven't syched the carbs yet (my sychronizer is still on its way) but I though I would have been able to get it pretty close by hand and then be able to set the screws. Any thoughts about what is making the popping noise? When it does it the idle drops, enough sometimes that the bike stalls.