I believe it is the fuel auto valve, Which is a vacuum chamber for the fuel to flow to the carb from the tank so it doesn,t overfill the carb I believe. If you take the screw out from the cover you should be able to see a square metal device that the fuel line goes into. pull the cover and see if it is a loose fuel line or the gasket may be shot in the valve. there is also a small hose that goes to the rear cylinder (i think that is where it goes) on that valve also that could have popped off too. The reason you would only get the leak when running is due to the fuel flows through there on a vacuum thus automatically closes when the engine shuts off.
I can't find it and I have looked nowhere
US ARMY 2004-PRESENT
2000 VLX (SOLD)
Last edited by Afghanvet_2x; 05-25-2011 at 10:43 PM.