I was riding most of the morning with no signs of trouble. I was cruising along in fourth gear on a long wide road (road to randsburg for those of you in so Cal) when all of a sudden it just died. Went to kick it and the kick starter is locked hard. Bike just had a fresh oil change before the ride and the coolant level was fine. It may have been running a little lean as I was getting quite a bit of popping on deceleration but it wasn't running hot or boiling over. I drained the oil when I got home, and you can see fine metal particles in the oil. I am hoping that the piston just seized, but I have a feeling it's going to be one of the rod end bearings. Any ideas as to why a motor would just go like that? One thing to note, is that it was blowing a bit of oil out the valve cover breather tube most of the day. I usually change my oil before every ride, so I just figured it was a little overflow.