My friends ZX12r was ready to go this weekend and the weather was perfect, so we went to some great roads for our area. It was the first time we had a chance to go head to head with both bikes at their peaks. My Busa has 171hp and the ZX 175hp with 101torque for the Busa and 95 torque for the ZX (I weigh 220 and he weighs 195). With those #'s you can probably guess what the outcome was. We did about 20 roll-ons from 2nd,3rd and 4th and with equal starts they were very close. At the lower rpms I would jump to the lead and as the rpms increased, the ZX gained. As we shifted, I would pull ahead and the ZX would start creeping up as the rpms got higher. I usually held on the throttle longer and would end up ahead at about 160mph. I seemed to have the best performance in a 3rd gear roll-on, which resulted in a 2 bike-length lead. In second gear, the rpm's usually started higher, so the race would alternate between the two of us. Roll-ons are not an exact science, but since I drive a Busa, I would have to give the edge to me!!!!!!!!!! Gearing played a big part with the Busa -1 in the front +2 in the back with ZX -2 in the front. We had a stock 02 ZX12 riding with us and I wanted to see what would happen in a third gear roll-on. You guessed it right- it wasn't even close!!! One of the many reasons I chose a Busa was because I was tired of my GSXR 1000 getting eaten up by the ZX. I feel alot better riding with my buddy knowing I have the power of the Busa beneath me!