Your bike is gonna vibe either way,if they are that bad then it is not coming from your bars,I've heard of sand in the bars sealed by silicone on each end,silicone alone,foam,there's lots of myths out there,usually when I am on a ride the first leg is full of arm pump then once I take a breather it settles down,learning not to hold on for dear life is the secret,easier said then done eh.