It seems that on certain frames thier is more vibration's then other's. I'm lucky and don't have that problem. Some get alot better after some miles are put on.
Be sure to check you mount that they are tight. Some use rubber around the frame for the mount to limit the vibration...others put slugs in the handle bars...
Rubber around frame mount
I think the post about the handlebars is in here towards the back of the thread...http://motorbicycling.com/f3/take-ti...e-tip-121.html