Is there such a thing as a 750 head. As in if the bore and piston are bigger I just picture the original head as a combustion chamber and it seems that's where the power would be, in a bigger combustion chamber. I don't see how power is increase is, I am trying to picture it. Idk if I'm thinking about this correctly. Just trying to get an idea. I would like more hp and torque, I did decrease my rear sprocket and would even go to an 18 on the front, I like the smoother cruise and the power to play. Looking at the port work being done it seems I'd be just as good to increase the in and out of the fuel mix and exhaust.