I went out riding the other day finally got rid of the engine bog and the sleds running awesome, im driving in some deep snow and every once and a while I feel a little vibration which feels like its coming from the track, and then when I get on the groomed trail its almost a constant vibration. It has pretty much started ever since I read the preventative Maint. tips in the manual and tightened the track, but I didn't tighten it to the Yamaha specs since that seemed very tight, and I went and made sure the track was realigned which was a pain, since it didnt want to seem very much and people had all different ideas of measuring to make sure the track was aligned. I thought the vibration might of been from the nubs rubbing the sliders or something but they dont seem to be touching, any ideas? thanks