Yamaha does frequent this forum but... if they would have approved your upgrade then they would 'probably' have to approve all other requests to upgrade. The original clutch basket has proven to work as designed but not as good as the upgraded clutch basket. There are many Tenere's with 50,000 miles, one that I know of that has 100,000 kilometer's, and one with 129,000 miles. These all have a poorly designed clutch basket and Yamaha does not want to 'adventure motorcycle up' and replace these poorly designed parts. Something they will have to live with for many years.
Have I replaced my clutch basket, no... but I will if I don't sell it.