I want to make my '03 YZ450F have a more CRF450R like powerband. I rode a fellow TT'ers '03 CRF450R this past saturday and I really liked the powerband on it. My bike will happily break the rear tire loose at 1/4 throttle and his bike will just grip and pull. He said that my bike would act the same if I just got a flywheel weight. So, I want to know how much I should add. All your help is appreciated!