I had a similar problem to this on Saturday with my 05 YFZ, the 2 case bolts to the upper left of the clutch cover were just missing...have no clue how long, but this is the first time I saw oil spewed everywhere so it had to have been on the Thanksgiving trip...regardless...I wasn't too happy that two case bolts just fell the hell out....
it wasn't 5 by anymeans...but just as frustrating...especially when it happens out at Dumont!!!
hopefully this won't be an ongoing problem!!!!