There is not much space in between the rocker and pipe. It is tucked up pretty tight. I see what you mean about being a little complex but it really is just a simple 180 turn on a worm drive motor. The main thing is that whatever the mecanism is it needs to be far enough away from the pipe while driving so that the shield does not heat up just as hot as the pipe. My motor cycle has a metal heat shield on the exhaust and after a long ride it is pretty hot also.
