Im not to sure what causes headshake? what are some causes, I noticed my bike shakes a bit sometimes when accelerating on straits on rough hydro field roads, small rocks and a bit of lose dirt with small ruts. I can usually keep it under control but today I was on some hard packed soil running threw the gears and when I got to the bottom of 3rd all the sudden I was over the bars the bike tossed me off from what Im thinking is head shake. The wheel went hard left and I went off and broke my stock bars and my new hand gaurd cause the stock bars are weak! it was scary and an hard hit, thank god for AVS balistic suits and helmets! do I really need a steering damper or is there somthing I did wrong. please help!