I realize that there are other threads that help address this problem, but I couldn't really get a straight answer, there was always too many questions left unanswered. So here we go. I've had my bike since October (or thereabouts), and it's always had really bad headshake. I talked to my buddy's about it and they said that it's all in my head, but it sure as heck isn't. New years weekend I was at the dunes and was going 5th gear down a relatively hard-packed quad trail, with decent sized whoops, about a 1/4 mile from camp. I hit a small fist sized rock and it sent the bike into a lock to lock headshake. Luckily it recovered on it's own, but I was SCURRED. Fast forward to yesterday. I went riding with my brother and a couple of friends and it shakes bad on pretty much any kind of rocks. Small, big; as long as I'm above 3rd gear, it will deflect off of the rock and send back a small shake, which in turns slows me down. What adjustments should I be making here? I feel bad because I'm causing everybody to wait for me and I don't feel confident on my bike at all.