My dad just bought an 07 Road King 96 CU with a six speed. It has an aftermarket Vance-Hines pipe and has been tuned by Barnes for the pipe.
He dropped by the dealer today, and was told that it would need a fresh dyno tune at the 8000 Km service
I find this hard to believe.
Also, what oil should he use?
Actually, I have a bit of a question: that pipe has O2 sensors on both cylinders. Is that stock Harley, or a PC 5?
I understand there are a few Harley techs on this board...