carberator ??

[Rookie Rider]

Ok so a few months ago i bought a gas tank from someone on this forum. A nice blue tank that i stripped to bare metal and sanded, primered and repainted to match my red bike. During this time i took carb off and jets out to clean. Float off too. Put it all back together to what manual says with float hieght and all. Have a new petcock also that came with the tank, no filter on it, just the 2 long ones that go in the tank itself.Filled with some gas yesterday and it did start but when i give it throttle it sounds like its choking for gas, and stalls when i give it throttle and some white smoke comes out the muffler also a bit. Cant get it to move while in first either. Im gonna take the carb off again and see whats up. Oh, i also did the needle mod and changed the position of the little C-clip. Any ideas from the experienced folks out here. Thanks.