Gearing will not change the mid range, low end, or top end at all!!! Might be a pet peeve of mine (obviously spelling isnt) but gearing only changes the rpm at a given speed and torque at the wheel. You either get more or less torque at the wheel at all engine speeds. Power DOES NOT CHANGE. Personally, I like lower gearing. I went with 16 tooth front and like it alot. Its about 6% lower gearing. 6% rise in RPM, 6% rise in torque, roughly. With a heavy tug on the bars she can now power wheelie in 2nd. No clutch abuse needed.