Well I have received awesome info on tires, now how about sprocket combos. I ride mostly tight stuff and a lot of hills. Maybe I am jumping the gun right now (without first upgrading my flywheel) but I am wondering if it would be worth if for me to change my flywheel combo? I am finding myself constantly clutching and braking on the downhill trails because I am carrying too much speed in 1st gear into turns. On top of that, I am feathering the clutch on the uphill stuff trying to keep on the power. I have been told that the WR would have been a better bike for my riding areas. I am not a big guy and the added weight of the WR did not work. In addition that YZ450F power is like crack to me, I can't get enough of it. Any advice for an addicted junky????