Sorry, but I can't hear your loud ass pipes in my nice quiet luxury car.... I don't give a fuck how loud your bike is.
2008 Honda CBR600RR - Graffiti
2002 Yamaha WR250F
I am going to put this one on my wife's 250, it should help
http://www.youtube.com/watch?v=Zjxs1HAzrVg&feature=player_detailpage#t=18 s