There is a crankcase braeather hose on the right side of the bike between the center stand and the frame/muffler. There are two hoses, one is capped. Take the cap off and let the stuff drain. According to the Clymer´s guide, it should be checked frequently, more often if you ride at full throttle or in the rain. There is normally about a teaspoon of water and maybe some dirty little oil balls that come out...