I wonder if it is coated from the factory...if so any work done to the the cylinder would require recoating. Many places aren't set up to do it and won't mess with motors that require it since it involves sending it out for plating.finally gave up and ordered parts for rebuild. should be here anyday been waiting for 3 weeks. anyone know anything about the cylinder they said it could not be honed?
looks like some valve trash and an oil ring was the problem. gonna change piston, rings, cylinder, valve seals, and see what happens.