I have a 2001 ZX6R. I want to do a sprocket change and stretch. I have been reading about the gearing changes and I want to know is if i do a -1/+2 change how many RPM will that raise highway driving? I drive my bike daily. With lots of highway use. I dont wanna be running 65MPH @ 8000 RPM or anything. What will it do to the RPM?