After riding yesterday and not having any probs I was talking to my service manager about the clutch update and asked him if there was anything about the flywheel problem. He didn't know about either one(they don't sell many dirt bikes).He said that he would talk to Yamaha to find out. He called a short time later and said my bike had the clutch taken care of before it was shipped to them. That may be why it worked so well when I rode it the day before. But he said bring the bike in so they could check the flywheel out. It sounded like Yamaha has a good idea why the woodruff keys were breaking and are trying to get it taken care of. I am just glad they are on top of it. What is everybody else hearing?