Hey Clint,
This may just be redundant for me to say this to you but, ...Make sure you you clean out every little orfice with some kind of carb cleaner. I mean use the little straw that comes taped to the side of the can and look for the cleaner to come out somewhere else. I mean double and triple check each little orafice to see the cleaner come out somewhere else. Then use compressed air and do the same thing. I don't know how many times I thought I got every little passage then realized I missed one because the bike still didn't run well then had to take the carbs off again. It's easy to miss one.
I would have cleaned the carbs out first especially if they have been sitting around in the dust.
Don't know how many times you've this before and I don't mean to insult you but my suggestion is to be as thorough as possible when doing this. Of course, if you're going to be experimenting with jet sizes and adjusting the height of your needle, you'll be removing and reinstalling the carbs allot.
Ed