High speed vibrations

[Fazerjon]

Hi people, just wondering if anyone else has experienced high speed vibrations on a Gen 1 thou that start around 100 mph upwards (at the Isle of Man before anyone starts saying anything!) I’ve checked wheel bearings, head bearings, swing arm, replaced chain & sprockets, checked engine mounting bolts, tyre pressures, etc but all ok. I took the wheels to my local tyre fitters just to re check the balance and all is ok. I don’t think it’s an engine internal vibration as it pulls through all the revs to the red line no problem. I’m stumped for ideas now. I’ve checked the mirrors and fairing mounts too. The only change is new ish (400 miles ago) Michelin Road 5 tyres. Never really noticed it with the 4’s.