This may sound like it's coming out of left field, but how's your clutch?
I have had engine vibes before on different bikes and two of the causes were;
1, loose or not correctly torqued engine mountings. To fix this I backed them all off and re-torqued them.
2, loose steering head bearings. This felt like it was the engine that was vibrating.
tuono 2005 no much vibration.Do you know anyone else with another Tuono ?
If so, try that bike & see if its the same.
Or get someone else to test your bike - it may be OK.
If its too bad for you - take it to a dealer for advice.
Hummm, learned FUDS what you yoos guys think?