Hi guys i have decided that the stock exhaust is too quite, and i would like soem sound for saftey reasons. so can anyone recommend me the loudest exhaust for this bike (i already go the rwc so i cna mod it now and where to get it. also is it worth DIY or get pros to install? thanks. edit** there are various forums/youtube vids that mention drilling holes in the exhaust anyone know if this will screw up the engine and is it legal?