Good for you! Now, to give those sticky valves a little insurance against doing it again, run some type of fuel tank additive like Marvel Mystery oil, about 4 to 6 ounces per tank of gas to help keep the valve guides lubed. Also, dribble some of the same stuff down the carburetor with the engine at a fast idle until you get a heavy smoke from the exhaust. Shut the engine off and let it sit for a few hours. Restart it, and goose the throttle a few times to blow out any carbon deposits the top cylinder oil has loosened up. That was a routine procedure during a tune-up back in the 50's.
Jerry
