My Dax Titan has been bogging down and wanting to die while under throttle. It idles fine, but when I apply the throttle it wants to die. I changed the gas out and drained the carb and it ran fine for several miles. Now its doing it again. Drained the carb again....ran okay for half a mile....doing it again. I can't belive I got bad gas from two different gas stations. Any suggestions?

Oh, and I keep the gas cap loose.....had that problem a while ago.