BUMP. I want to do this mod, but I too am curious why some people are saying you must mod the tube, and others are saying it's a bolt on affair.

If anyone knows, let us know :p

Edit: just re-read this thread and think I understand now. It looks like the r6s part is entirely bolt on with no modification, BUT it also won't make the throttle have a shorter twist.

It looks like if you want to get a shorter twist, you have to buy the r6 part (part # in this thread) and do the modification.