probably the tune,if it is vibration.
there is more to a good tune than hooking up a t max and installing exhaust in one afternoon. the timing maps are all over the place .so if it wasent actually tuned,and tuned correct that could be your problem.
if the tune is correct....check and make sure the rear cylinder head pipe,isnt touching the primary. take a piece of cardboard and fold it over (doubling it up). then loosen the rear flange nuts and the bracket that holds the head pipe to the starter bolts. slide the cardboard between the head pipe and the primary housing,re-tighten the nuts on the flange and the bracket,pull the cardboard out and ride it to test.
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