I just picked up my new yz426 a few weeks ago and have only put a few break-in hours on it. I went up two on the rear sproket to help with stalling in the tight stuff, then headed for the trails. It was not a pleasent experience to say the least! I must have stalled this bike 10 times in 15 minutes of riding tight woods and when I did keep it running it had so much GRUNT that it threw me all over the place. I have no problem handling it when the trail opens up but anybody can ride a bike in the open. I should also let you know that I have been riding a ktm 200 and a 250F for the past few years and I've never had a problem like this. Would a flywheel weight help or should I just SHUT UP and learn how to ride this HORSE? Any help is much appreciated.