Tiger 800 Mysterious squeaky front end. Need help!

I have a 2016 tiger800xca.
At about 38mph and above there is a squeak coming from (I think), the front of the bike. It's not the suspension as I have jumped up and down on it without effect. It's not the front brake as I have applied brake without effect. It's been back to the dealer twice. They have replaced the front wheel bearing (found to be over torqued and collapsed),but the noise still exists. Garage says they will have another look. Any experience of this on here? Any ideas?

 

Thanks