Well guys, I have to admit Im a little dissappointed. My brother and I are just about even in skill from a roll on. In other words we both shift well and accurately. I have an 08 Busa and he has an 07 R1. We rented a long private straight away for about 30 seconds because speeding on the street no matter how remote is illegal and stupid right . Anyway, from second gear at about 30 to 165 indicated it might as well have been same rider, same bike. They were dead even! I really expected to pull away from him. Im thinking its just a matter of weight. Im guessing wet weight is 430 vs 560. He is 205 to my 245. My bike is bone stock. His has Akrapovic slip ons. Thats around 170 lbs to his advantage. A 150lb rider is probably going to walk me!!! Now I have a Tsukigi Canon in the garage waiting for me to install it. Im sure that the weight savings will help a bit and it will probably pep it up some but... I guess I expected a little margin.