My Goldwing currently has vibration coming from front tire but it’s nowhere near as severe as what you describe, I have a new set of Dunlop Elite 4 tires mounted on spare rims but plan on putting a few thousand more miles on these before removing them. The pretty much worn out front tire is a Metzler 888 and I never liked the tire even when it was new and will most likely never buy another Metzler tire for my Goldwing, the rear was even worse so I took that tire off a long time ago.
However these type of issues can be caused by a lot of different things. Have you tried riding a different Tenere just for comparison ?