The header pipe and pipe Dp de-cat pipe on my S4r has taken on a horrible brown finish ive never seen before, this is only after a total of 2700 miles and the de-cat pipe hasnt been on for all that time.
Guess it never happened on 748 or i never noticed it cause faring hid it. Exhaust on h o n d a never looked like this after many more miles.
Is this a sign of poor quality almost seems to be rusting when i wiped it down brown powder on cloth.
See pic
[Edited on 16-4-2006 by Lee1980]