Just picked up an '01 yz426f with only about 20 hrs. on it - it sparkles! I want to set it up for off-road riding, hare scrambles, etc. Stock gearing is 14 & 49. I just put a 13 tooth front spocket on, but it's still so fast in some of the tighter more technical woods I ride in. Should I go up to a 51 or 52 tooth rear sprocket? Also, what's the best word on flywheels as far as brands and weights? The stall factor is definitely higher than on my '02 wr250f. I'm familiar with Steahly, SFB, and Trail Tech? Is there a difference? Where's the best place to purchase - they're all so $$$. And finally, what's the optimal weight? THANKS!!!