I sold one of my son's KX85's to a friend's son and the bike ran great, we never had a problem with it. The new owner rode a dozen times without any problems but the last time it ran he said that he put regular in instead of premium. He said that the bike was running bad with much less power, bike died and hasn't started since. I had done a new top end before selling to them. They have done everything they know from cleaning the carburetor, changing the plug and replaced the reeds which they said were cracked. I went over there today and see if I could get it to start. Good compression and spark, took the carb off and checked the float level. It will not start at all, nothing. :confused: Any suggestions or problems with these bikes. Our other 85's, race and practice bike still run excellent.