Better yet, get the first 3 stamped letter/numbers off the side near the float bowl gasket and and google them. If there's no letter/numbers stamped there, it's a Keihin knock off.
with the info from Herpderplol, I went back to prior owner- turns out he gave me the wrong carb from another bike in the bucket of parts. He swapped with me and I now have a nice looking Mikuni 28 mm and I'm on my way to getting it running again.