Thought I'd create a new post to consolidate woodruff key failures to determine who's still having problems and hopefully garner any new info for those unfortunate souls having to deal with this. Here's my latest sad tale and comment: After returning from dealer with a lapped flywheel, retorque to 47 lbs and loctite, sheared yet another woodruff key at around the 16 mile mark in Thursday's Alligator enduro (Daytona, FL). This time I did NOT use the e-start. Also, got no warning. Bike was running great til the time it died. Just seemed to stall in second gear and then wouldn't crank. The total now is 120 miles and three woodruff keys. Once again had to be towed out! Found a head Yamaha tech at Friday's road race and had a nice long heart to heart. They are now going to send a factory tech to my dealer to fix the bike. They seemed surprised to learn I had the problem without using the e-start. Discussing problem with several road race mechanics over the weekend, a prevailing theory is the crank is now damaged and lapping will never work. Anyone else still having problems? I'll update with details as soon as the bike is fixed.