Ok, I sprayed carburator cleaner in the carb while it sat in the garage (to install new warm start cable) and when I went to ride it, it was poping(not quite a back fire) and is shooting flames out the exhaust when this happends.(when in neutral only while reving it up) I have now cleaned the carburator 3 times and it still does the same thing. I was told that the pilot Jet would cause this but I have gone through the carbeorator and it still runs the same, poping ect....Does anyone have any input on why. The spark plug is clean showing the bike is running lean and in less the 5 minutes the exaust gets red hot, which it has never done either. Any suggestions on what it might be. It is not the warm start, it works fine and leans the bike out when you pull it while it is running like it would normally.