I have a suspension question. On fast bumpy straits I sometimes have a real problem keeping the bike pointed strait. I go strait, but the back wheel is dancing around like crazy and sometimes the head starts to shake because of it (not a fun combination). This usually happens near the top of 3rd gear both under acceleration and while coasting (I usually don't get any higher than 3rd gear). I'm 160# and the suspension is stock except that I'm about 1/4 turn out on the back high speed damping and a couple clicks softer on rear low speed and front compression. Rebound is stock on both ends. I initially set the sag at about 90mm but haven't checked it lately. All other situations the suspension is great, just gives me a hard time on bumpy straits. Thanks for any tips!