I bought this bike new about a month ago and couldn't hold off on starting mods. I did a ton of research between this and Akrapovic but really liked the deep sound of the Yoshimura better. I don't know if they changed the O2 sensor location or my wiring was a little longer but the 02 sensor wiring length was perfect. I've seen several posts about having to reroute it due to it being tight but mine was fine. I also noticed they no longer pack the exhaust in expanding foam, at least mine wasn't. I planned on trying it without the DB killer first and then adding it if it was too loud. After hearing it without the DB killer I'm not sure I'm going to even try installing it. I haven't had a chance to take it out yet but just from starting it in the garage the pipes are already starting to change to a nice shade of gold.
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