I have a '93 K100 LT, yesterday after riding home from work and parking the bike, I noticed several small puddles & one large puddle. It was fuel, dripping from the tank vent. The tank was not full, I had ridding about a 100 miles after a fill up. There appears to be some type of chamber at the top of the tank that the vent line taps into. I suppose the chamber is supposed to separate liquid from fumes. Any ideas why this would happen?