Hey all, I just upgraded from a yz426 to an 04yz 450. I love the bike, it is a huge difference from the 426, great bike but heavy. Anyway, I get head shake when accelerating over some rough stuff or when landing into some rough spots. I have only been on the bike for a couple of rides, and am not riding it agressivley, not jumping some of the larger jumps that I was used to hitting on the 426. The suspension was set and revalved for an agressive B rider that weighed only 145lbs and I am not so agressive and weigh about 180. The springs are softer than stock, would this cause the head shake? I am not completely comfortable with the bike yet and it is hard to adjust the settings when I am not being agressive. Mostly MX. Adjusted the sag, and slowed the rebound a couple of clicks, the top of forks are near the top of triple clamp. Where should I start?