There's way too many variables here to even take a guess. Can you tell us more about your bike? I mean, they all vibrate, but is it more of a shake, chatter, etc? Does it happen in a certain rpm range or speed, or does it do it all of the time, even at idle. It could be a number of things from bad tires, to a bad tune, to bad motor mounts, to a bad crank, to worn out riser bushings, etc, etc, etc. The list goes on.
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2015 Denim Black RG, FM ss ceramic coated 2-1-2 pipe, White Bros Original E Series Mufflers, FM ac, PV Tuner