I have a nice GS850 that was donated to me. My experience with bikes has been limited primarily to the KZ family. The guy that gave me the bike said that he stopped riding it when he saw gas coming out of the air box. I assumed this meant that the carbs had a float issue. I pulled the carbs and cleaned them, put the bike back together and it ran great. After about 10 minutes of running I noticed gas dripping from the air box. I found that the breather hose was misting it back into the airbox from the breather. First of all, I am not familiar with the breather, should there be fuel blowing back? Second, if not what could be the problem. Any help would be appreciated.