[mainlinecoffee]

The only components needed for internal combustion is fuel compression and spark. Can you check that the fuel is flowing? Can you check for spark? If it is very hot then it may be warping he cylender head or valves. My Harley got so hot in fifteen minutes I burned the logo in to my thumb when I went to turn it off. Also I am fairly certain that you check the oil cold but don't quote me on it,better to have too much than not enough. Is it possible that the fuel Petcock being vaccum operated is cutting out due to dry rotted lines? Maybe the ignition coil is very sensitive to heat. Can you get a accurate reading of how hot the head gets? I'd be wary of anything over 240 f.