i have a 2003 954rr cbr. i bought a yosh bolt on rs-3 pipe. it doesnt make the deep purring throaty sound that my 1998 gsxr 750 made with the same pipe. actually theres not much noise at all. how do i get this sound that i want? i want that deep exhaust noise to be heard from blocks away. im sure you know hwta i mean. without having to spend a million bucks on a full pipe, can i remove the butterfly flap in the bread box cat??