I had the valve the gas overflow hose connects to upside down, I turned the valve right side up and now no air pressure in the gas tank. Can anyone tell me what the valve is for, my guess is that it keeps overflow gas from coming out to fast.
I still have the stalling problem, I will check the hose lines and see if I can find anything. Is there a way to check the MAP sensor to see if it is good? Someone said that they removed the sensor on their bike and the stalling stopped. Do you have to go to dealer to get a Map sensor? I saw some used sensors on ebay but think I would be better off buying a new one if needed.