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The head is 4 cap nuts. (take the plug out first) easy pie.
Take the nuts off in a nice criss cross patern. Pull the head off. Easy pie.
Is it a wetish mess? Get an ultra clean rag and wipe it all off, crank the piston and wipe again. Cylinder walls, piston top and head. Clean the gasket for re-use. Button it up with proper torque in a criss cross patern. 10-11 foot pounds as I recall.
Use a new plug with .018-.020" gap.
All I can say is this is what worked for me and it's easy. Mine wouldn't start after my carb was having issues. I fixed the carb and it wouldn't start, so I took the head off, cleaned it and it started right up.