My ride is a 95 klx 250 with the stock carb. Problem is bike was back firing and would not idle. A friend of mine pulled the carb and cleaned it out with a air hose put new plug in it and stuck it back on. Upon starting it up for the first time back on it started good sounded good no backfire. But had gas comming out in a steady stream from the black over flow hose comming out of the bottom of the float bowl. Wondering what could be causing this and a possible remedy. Thanks for any replys.