Yeah what Rupp said, I have the same engine with the clip inside.
If you don't want the hassle you could put a wire in the gov/throttle spring to keep the spring from stretching when the gove goes to pull back on the throttle. Doesn't seem to be as bad to do this mod on flat head Tec's as it is on other engines. Just make sure the engine is turned off and you have it long enough and test it with the wheel off the ground.
And of course don't over rev your engine.