Originally posted by racerdx6
I think the tank does have a pressure fitting (a piece of fuel tubing going into the tank lid and going to the pipe?? right
). We haven't installed o-rings under the tank yet. Is there any other things that we might be able to do with the stock tank to help reduce the amount of bubbles in the fuel line going to the carb? Are there any aftermarket tanks that are a direct fit for the ntc3 that help reduce the bubble problem? Thanks! 
Try another tank. IMHO the problems are quality related as most AE problems are. IE they don't do a very good job keeping the molds fresh and looking at the parts they get from their suppliers. wherever they were getting those tanks is the problem. That's why you see some people who have problems and others that don't. I'd call AE and have them send you a new one, tell them you're having problems, or like so many others do the Mugen tank.