When servicing my '89, I took one look at my headpipe and said...you know what...
now is the time to clean that up.
It was a little rusty.
So I decided to remove the shield and take off the back bolt, see the wrench?
you can see in the photo, i've already removed the headpipe/head mounting flange at the exhaust port, and the flange is hanging down on the pipe..
You have to remove the bolt that the socket is on, but to get to it, you must remove the shield.