Help: 90 VFR vibration while accelerating and cruising?

My father has a VFR that we both ride, (i have an RR so we trade some times)

The VFR has created a vibration under power. When you pull in the clutch it goes away.

Had the mechanic look at the vfr. The bike has new plugs and the valve clearance is good. He stated it is still smoother then an inline Suzuki but we know it is a VFR and it should be smoother.

The manual mentions engine mounts which we have not checked yet.

Any other suggestions?

 

Yea...check chain and sprockets...broken tooth on the front....kinked links...too tight.

 

I figured that would continue even when I pull in the clutch but that is something I will check.

 

i tot it is a characteristic of a v4 engine?