Well vibration is hard to say about as that's relative and we each feel it differently - given that your bike is in good order and there's not additional vibration for some reason.
Regard body position. That's where your fix is, not necessarily the grips. In a more sporing bike, leaned over positure, you're using your core/trunk to support your upper body - not leaning your weight through the shoulders/arms to the bars.
Ensure the ball of you foot is on the pegs (when not needing to shift or brake). Grip the tank with your knees. Support your upper body with your core.
- Now you should be able to ride with your elbows flexed and be able to make 'chicken wing' motions with yoru arms without effecting the course of the bike. If you cannot flap your arms, you're too stiff/leaning too much on the bars/have over straight arms.
I suggest you take a peek at the photos in here:
http://www.ducatimonsterforum.org/index.php?topic=58317.0- You'll see the orange helmet fellow in the first could probably make the wings if he wanted to, even with the agressive positure he as and pretty steep lean on the bike
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