What vibration?

Phelonius

i just came back from about a 800 mile trip over 2 days and I've got sweet spots at 51, 57, 59 and 61 MPH indicated w/o any noticeable vibration. I do have rubber insert grips but that was mostly for their larger diameter to help prevent some hand cramp concerns I have. If you have vibrations in my opinion you need to review your wheel balance and roundness, loose bolts on the egnine mounting points, fluid qualtity and quantity in the front forks as when they are right it is a pretty smooth ride. Max

If you have stock bars then they are already weighted.
And you won't be able to add these weights.

If your bars aren't weighted and the grips allow, these will add the needed weight to your bars by sucking it out of your back pocket.

Others have suggested lead pellets in the bars.  But you'll need to cap the bar ends securely.  I haven't found any bar ends for 1" bars in the $10-20 range.  The pellets will do a better job at killing the vibes then the bar end weights like dead blow hammers that don't bounce.

Actually, the stock "clamps" on my 98 had plastic/rubber bushings and I reused them with my pullback risers.