I have the R, I saw this mod on XT660.COM but i wnat to find out from someone who has don eit to see if it is worth it.
They drill 4 holes in the end of the pipe around the baffel , apprently give it a bit of a bark.
Anyone done any mods to the standard pipe to give more of a brak, i have heard the easy way is to drill 4 small holes at the end around the small baffle, anyone done this?