First things to check. The head steady/ head stay, is the hardware tight on both ends ? Engine mount hardware, all tight ? Exhaust fasteners and foot pegs all secure ?
When those all check out well you might move on to checking tinwares mounting and then primary and secondary drive chains slack and drive sprockets and alternator mounting.
FWIW my Bullet TIMEX the vibes increase as the fuel in the tank decreases which is something else to consider.