Re: Anyone in Gilbert, Az area that can help?
City of Angels suggested you to check all of the engine mounts. Look closely for cracks, broken studs, missing nuts, etc. If all looks good then you could have something internal going on. A hard vibration that suddenly crops up could be the sign of something broken inside.
How's you chain tension and alignment. No chance that the vibration is a loose chain/ sprocket, wheel bearings?
AZBill offered help too. It's always easier to diagnose a problem like yours first hand instead of via written text.
Age and Treachery Will Always Triumph
Over Youth and Skill & "Charlie Don't Ride"