Well after I installed my new tank that was from a CB550 onto my CM400 it leaks gas out of the tube that comes from the bottom of the carbs. It just pours out even when it's running or if I close the petcock until the bowls are empty. It never did this before with the twist cap that was on the old tank. Now the new tank has the latching style cap on it if that makes any difference. Hell before I never even had to close my petcock after I turned it off and parked it. Now I do it ever time and it leaks until their empty. I was wondering if the tank is sealed more then before and it's become pressurized and pushing the fuel out or fuck I dunno. Can I just put rubber vacuum caps on the bottom of the bowls and close them up or no or maybe make a return line to have it feed back into the tank or maybe drill a hole into the top of the tank or lid to vent it like a motocross style gas cap? I'm running out of ideas and gas. I even tried just opening up the lid and seeing if that did anything but nothing. Maybe the seal is bad or something on the lid? HELP!!!