So I guess you must all be youngsters. Back in the 70's when most bikes were twins & if 4-stroke they usually only had 2 valves per cylinder. The performance models would have a carb per cylinder & the commuter/cruiser/shopping bikes would have one carb. But all basically had the same engine with maybe different cams.
A single carb model robs you of the intake pulse tuning, so fine for low to midrange power, but NOT good for maximum performance. A single carb made the bikes cheaper too, so that is why it went on the plain old cooking models. A single carb model would lose 25-40% of its peak power output, but would give better mpg, if not thrashed everywhere.
Your choice
