Picked up an 83 750ES - I'm Forked

[kingofvenus]

Like I said before it is a 550, an E model. I'd bet the fork seals are junk, that is probably why the fluid is low. You could just use some PVC pipe on top of the springs to add some pre-load, 1 or 2 inches would be plenty, just make sure the cuts are straight and square.

[Calvin Blackmore]

There is a current ebay listing for a gs 550 e
I thas all kinds of useful bits
whole bike is being parted out and it has low miles according to the seller

that is a gs 550 L 550 e Hybrid

[DarkDevil]

The ES models have a half fairing, which though it might've been missing, it doesn't have the mounts for it. So, you're correct, E model.