Alright - here's the problem. Sporadically (not necessarily every time I ride) I have an issue where it will idle ok at a stop and then begin to slow to the point where the engine will stop running if I don't give it the gas. Then, when it stops, a small amount of fuel drains from the small line sticking out from the underside of the bike (several inches behind the kickstand) on left hand side. My questions are "Any idea what might cause this?" and "What is that line where fuel drains - is that what's known as the 'breather' line?". The bike seems to run fine at normal speeds. And, without idle speed adjustment, sometimes it idles fine and other times it will exhibit this behavior. Fuel filter problem maybe? Any ideas would be appreciated.