^^^that's true as well, what gearing do you currently have in the rear differential? If you have something like 3.55's it would be beneficial for you to go to 4.10 or even 3.92. What issues is the harley having? What bike is it? I have a buell and my brother and father have harleys, and I have become somewhat knowlegable on the sportster/evolution engines. Maybe I can help...
Breathing in and out is good enough for me.