I own a 1998 honda cbr 600 f3, a few days ago i installed my yoshi stainless steel slip-on and let me say im very happy with the sound and performance. I road for 160 miles (highway,country) and the longer i road the louder it got. i wonder how long it will take to fully break in? Now i feel a hell of alot safer in busy trafic!! I find my self bouncing it off the rev limiter in nutrul alot (not trying to be a hard ***) just it sounds cool and girls get wet!! -JK- does any one have any experience in the 600 f3 engine as far as hight revs go??? ive been building and working on cars for i good while now but new to motorcycles, so what would u say? - thanx kris