I have an 03 YZ450f (fantastic bike) with stock gearing. I'm about to do some HS races (1st time) and I'm thinking I should maybe drop a tooth in the front or move to a 51 or 52 in the rear. I'm not ready to pop for the rekluse yet. I'm thinking on a GYTR off-road flywheel weight and the gearing for now. What do you all think?