I bought a new WR450 this morning and told the dealer about the woodruff key that I read about on here last night. At first they said " you can't believe everything you read on the net" but I insisted that this was something they should check out. They checked with Yamaha and to make a long story short, are lapping the crank and correcting the problem. I can't pick my bike up until in the morning since the locktite has to dry. Are my problems solved? Also, the dealer was very nice about the whole ordeal, they just were not familiar with this problem.