I can only go by what I am told. I was speaking to the mechanic who just got back from Yamaha training where I gather this was a hot topic. He took the cover off the right side of a Sidewinder and told me what to look for, essentially if there is a raised, square aluminum protrusion it is probably bad. He also called Yamaha with my serial number. The customer service rep also looked up my file and since I had just bought it he put me on hold for 2 or 3 minutes to check something. When he came back he told me that there was nothing that he could do.
I told him that Yamaha does well, dealers will do well but the customer gets screwed. When I mentioned I would get less money than yesterday if I decided to sell because it cannot get a turbo he disagreed, but as I told him.....he had his talking points, I had reality.
Bottom line.....it sucks big time.