This is completely normal. Now, the fact that you have S/E mufflers with a flash that is only for an air cleaner will make your bike a bit leaner.Taz Man said:I have a 2005 fuel injected Fat Boy with a stage 1 kit & screaming eagle II slip ons and want to know if anyone has come across the problem of the exhaust pipe from the motor turning red hot after only a few minutes of idling?