Yamaha have embarrassed themselves badly and have failed to deliver a good competitive bike to two good TT riders, they should issue a public apology to both those riders for wasting their time.
Yamaha have been building bikes a long time so they should have done better.
Don`t they do a test bed anymore i.e. let it rev until it blows up ? Surely that would have told them that it was not capable of holding high revs for a long period?