Hey everyone, i am brand new here and im hoping you guys can help me out a bit...i just bought an 03 kfx400 that looks pretty much stock, at least from what i can tell. the bike is in pretty clean and decent condition for an 03, but when i go to start it, it will only run for about 15 to 20 seconds. There is plenty of gas and the carb has been cleaned so im at a loss. i pull the choke, it fires up and runs for like i said..about 15 or 20 seconds, then dies. the funny thing is it will start right back up, but still only runs for about 15 to 20 seconds..:? Anyone have any ideas?