I just picked up a 1984 1st gen 200x with what I think is a heavy duty Westcoast swinger. It is definitely not a stocker. It has very nice welds, no brake hose mounts, and the skid plate mounts go from one side to the other just like the westcoast style. There is also a braided rear brake hose on it and that is what first caught my eye. My wife has the camera in her car so I'll have to wait for pics.
The bike also has so sort of aftermarket exhaust that uses the heat shields but I have found no ID marks on it yet.
And the last thing, the guy said there is some sort of after market cam in it and there is a spacer on the back side of the cover that says CDI that is not from the factory either.