Brodie said:
I am not home at the moment but I will check it out in the morning. Might be an early 77 which explains the single rotor.
Almost
all '77 models had dual rotors. Maybe yours is a '76 that was registered (originally sold) at a later date?
I covet the 8-valve GS750. The 16-valve obviously sucks and blows better, but I don't have the patience (or lack of patience) to deal with CDI. Maybe some day I'll convert a 16-valve to modern electronic ignition, but dealing with ancient CDI's is nobody's cup of tea.
Whatever you do, keep this one under wraps. We've been 'roddin' these out for some time, but we can't let the "me too" crowd in on this. I'll let them chase after CB's until the market there is dried up and the prices are insurmountable. Meanwhile we're picking up GS parts like fruit at the market or even whole bikes from people that think they have no value. Brodie, I don't have to tell you about that part, do I?

That's exactly what people
must think. Suzuki's are ordinary, cruddy, underwhelming and undesirable, right?
Yeah they have half a decade on the CB750, so what? All that matters to me is that they were faster, DOHC, and in my opinion still better looking if you can excuse the thin filmy chrome and crappy exhausts. By the way, they have really really crappy exhausts.
Find a good mechanic nearby, the blokes with decades worth of pin-ups and helmets on the walls. Ask which is better and they'll make a good argument for the CB750. Then ask why they have so many GS' laying around. XD
Can't wait to see the thread. You should start a thread.