Greetings and a question

[misterprofessionality]

the Yoshimura RSC pipe (the black one you most commonly see) might require EFI tuning or a Power commander to make sure it produces correct results when installed, but most anybody who's putting one of those on would almost always do that as well. My advice is to ask the owner if the bike has any of that done to it or if it's running stock EFI. if that is taken care of it should run fantastic.