Just one seat fell out - the #3 exhuast. Funny thing is, the pieces of the seat that were in the cylinders were magnetic. This material around the crank isn't magnetic. Most is very, very tiny and spherical. Like grit. I'll post up some pics of all the bearings and such a little later. The driver side head was all pretty burned up looking, especially around the #3 and #5 valves. I'm guessing due to the missing seat? Passenger side head looked near new.