WELL ACTUALLY...MY BIKE IS PIPED,JETTED AND HAS A K&N FILTER, IVE SEEN 158 MPH AND DONT TAKE IT TO REDLINE VERY OFTEN BUT I DO IT ENOUGH TO KNOW IT WILL PULL ITS BUTT OFF... IM STILL DEBATING WEATHER OR NOT TO DROP A TOOTH IN THE FRONT...I LIKE MY TOP END POWER..I THINK NEXT SPRING IM GONNA SARAFICE IT FOR A 929RR