There ARE days when you drop your buttered bread, and it actually lands butter side up. I was finishing up an oil change on my 400f when I loosened the oil supply bolt that holds the oil line giong into the head. I do this to make sure that I'm getting oil to the motor and didn't screw up the oil filter. I thought I heard something like angels singing, but I just disregarded it and kept on with the project at hand. As I was tightening up the bolt, I felt that old feeling of the head snapping off of the bolt. If you work on anything motor related, at some point, you will experience this. It was at this time I started added up the potential costs and/or the time involved in either getting the bolt extracted from the head. Neither of which I was excited about...to say the least. As I started to back out the bolt, I was amazed that it was complete and not just half of it. When I inspected it further, I noticed that the bolt had indeed broken, but not completely in half yet. There was a crack in between the threads that followed the threads almost all the way around, stopping just short of completely around it. I could even see where the last part of the thread was distorted and ready to snap in half. It was at this point that I realized this must be the day to buy a lottery ticket! It wasn't until a few minutes later, after I finished performing the pee-pee dance around the garage, that I found my son's bike had a flat front tire. Not wanting to ruin my mood from what just happened, I was thankful it wasn't the rear...the front is much easier to fix. Some days, things really could be a lot worse...of course I still didn't win the lottery!