Remember, many of the 750's were being converted into highway cruisers with windjammer fairings. There weren't any Goldwings yet.
Euro bars don't fit them, Honda even changed their own bars to work with the fairings. The US has big long straight roads and we often spent a lot of time on our bikes. Look at how many of us have removed fairings, bags sissy bars and luggage racks. I had all that, mine are naked now but on a long trip a jammer would still make the ride easier. I have K0 bars on mine.