I did not elaborate on the vibration I mentioned. In fact I hear an engine, or transmission, noise like clack clak. If I **** up, or even down, it stops and I hear nothing but the smooth sound of a perfectly running engine and transmission.
If I were to venture a guess, I was in the wrong gear or that the engine is out of sync and some pistons work more than others.
One last question" On the left handlebar, there are 3 buttons that seem to be related to the pistons. The have an on/off position. What in the world are these buttons used for?