But......... as well as gaining new tyres I've also gained a noise from the front end. It's half way between a howl and a whistle (bit like a jet engine sound) and it grows from around 35mph reaching a peak around 50mph and then seeming to grow weaker, possibly only because it gets drowned out by wind noise at higher speeds.
My dear wife (who is so unaware of noises on the bike that she hasn't even realised yet that I've fitted a Lazer end can

It's independent of engine speed (pulled the clutch in and coasted to test that), I've re-checked the tyre pressures and tried +2psi one day and -2psi the next day (usually run at 32psi). When I refitted the wheels the bearings seemed fine - certainly not loose, possibly slightly tight (?). Brakes aren't binding, everything's torqued up correctly (axle bolt, pinch bolts, calliper bolts etc), there's no unusual vibration and I've run out of ideas.
I know that some tyres can be noisy - has anyone experienced the same noise from Pilot Roads? Alternatively is it conveivable that the bearings could have been damaged when the tyres were changed (during balancing, possibly)? There is a temptation to change the bearings anyway just in case but if it's the tyres and 'they all do that, Sir' then there's no point.
Any other suggestions? I've done about 300 miles on the new tyres so they're properly bedded/scrubbed in by now.