Today, I replaced the head gasket on the RF along with the regular stuff(filing head, cleaning up head gasket area, cylinder, block, head, piston, and valves, new spark plug and air filter). I fired her up, and she ran perfect with no surging for 7-10 seconds. Then I saw the governor start to move visciously back and forth, the engine increasingly surged more and more. I choked it a little bit, and then she died. As of now, she's charging up since she's been sitting for a little bit. Is this normal, do I have to adjust the governor, or did I just completely mess up?