Its a crap shoot with this Bike

[CIP57_imp]

I have never owned a bike that changes each time you ride. Sometimes the bike is very low on vibs in the tank, pegs and bars and there are other times when this bikes has much more noise. Throttle response is spot on regardless of this but i can't figure out what causes the excessive vibration at times. The vibs are never in the seat and when you pull in the clutch its smooth as glass so its the motor. Its never to the point that you think there's a problem with the motor just annoying as heck. Amazing how it can go from smooth to buzzy just stopping for gas.
Its done this from when it was new with no mods.

Edit: A buddy of mine just bought a Ninja 1000 and we switched bikes yesterday for awhile, he thought the CB handled great in comparison to the older CB's but asked if its always a bit buzzy, i told him ride it tomorrow and it may be gone