Make sure your slack is out of the throttle cable. I recently removed my hand grib and added more slack in the throttle cable in the process. When I went out for a ride I noticed what seemed to be more back lash in the drive train. Sounds a little far fetched but, it made a difference.
It's not THAT far fetched. With the throttle cable slack properly adjusted, we make certain movements with our wrist, namely, learning to ease into the throttle most of the time. If there is too much slack, the muscle memory you've developed eases into the trottle (which still isn't on, because of the slack) and by the time the cable picks up the slack, your wrist is pulling the cable pretty fast. The effect is basically the same as just whacking the throttle on, instead of doing it correctly.