Just the head...very strange. Never seen that happen before. As soon as I pulled the flywheel off, the head fell right out. The shank of the screw was
Did just the head come off or did the whole screw come out ??
Yep, todays 2 stroke oil is far superior to anything available back then. However, so are the bearings, pistons and cylinders that the oil protects.
#1 cylinder 183
On compression, note that engine was cold when test was
Swap thermostat housings and see what happens