First of all, glad you're ok. I cannot believe how thin that frame is at such a critical point. I don't understand how the dealer can simply write that off as "everything was normal". Personally, I think that frame should be sent to Yamaha for a much closer inspection, but that's my opinion and I guess that would take several more similar incidents and sadly deaths for that to happen. Let's hope this is an isolated incident because looking at that thin frame material doesn't exactly instill much confidence in it's strength.Yamaha Turkey completed its investigation and reported that everything was normal (31 August 2022).
I'm curious, are you the first owner of that bike? Could it have been ridden hard by a previous owner who caused unseen frame damage that led to this (sorry if that was answered and I missed it)?