The link you have hooked to the control (the sprocket as you called it) needs to be removed and hooked to the governor arm out of the engine. Then the spring need to be hooked to the governor arm. Check the photo ILENGINE posted. The way you have it set up the governor has no control of the engine.
Remember the governor is what controls the speed and cannot do it if it is not in the link.
Remember the governor is what controls the speed and cannot do it if it is not in the link.