There is a tiny hose, maybe 3/8 inch outside diameter, that exits the bike at the bottom rear, just forward of the tire, inside of the exhaust. While unloading my bike it got caught and pulled off. There is a T-junction in the line, and it continues forward to slip on another nipple. I have never traced this line down before, so I don't even know where to look, or what it may vent. I am assuming it is a vent line, but don't know what for. I will try to attach a pic and see if that helps.