Ok perverts stop it. I get this vibration at about 2K-2.5K. I then goes away after that.

 

It may be that something is slightly out of balance and it only shows up at that engine speed. Kinda like how your tires can be totally fine until you hit 75-80 and then be fine until 110. My idea.

 

possibly

 

Yeah, I'd check that you haven't lost any wheel weights, or tailshaft weights first.

 

Might be engine related, thats about where the carb transitions from the idle circuit to the main circuit.

*Proof that I paid attention in Dr. Sterlings Nikki Carburetors 101 class.

 

You say it shakes at 2-2.5k rpm, is that parked and out of gear type revving or driving down the road type revving? If you mean it vibrates while driving, then does switching gears change anything?

Also, you might try moving front tires to back/back to front and see if it changes the feel of it.

If it vibrates while parked and revving then I'd be worried, 'cause that would be motor or clutch (I guess).

 

well it's only when driving so.