How normal is it for the 300 to vibrate when it runs? It is only a year old and riden by a tame 13 year old. Could it be time for a valve adjustment? The acceleration just doesn't seem to be as strong as I would expect. However, I ride a Prarie 700 so maybe I'm expecting too much. I'll pull the plug next chance I get to get a read on the jetting (there is no popping on accelaration or deceleration).

 

ttt