I took a trip from Kansas City to the Tail of the Dragon last year with a group of guys and one of them had a 2006 K1200R. By the end of the trip he was forced to ride at the end of the line because no one could stand to smell his bike. It seemed to occur when he was getting on the throttle (i.e. passing a car). All I can say is it's a great bike, but man it sure does stink! If it were me, I'd lose the OEM pipe setup. It's got to be something in the converter.