Last year, I checked out some library books on motorcycles, to read up on their history. What they said, in the linked article about the '69 CB750, is all true. It changed the game in every way. Honda had a winner, and they ran that thoroughbred for more than a decade. One documentary, available on YouTube, has a British fellow telling the viewer that the '69 was, "quite boring, really." It didn't leak oil, and it didn't require you to work on it on the side of the road -- it just worked! A few years later, Craig Vetter came up with the body-mounted fairing, and that, too, changed the industry.
If you can find some library books on the history of motorcycles (the picture books are best -- eye-candy, Baby!), check them out. Thumbing through those books not only helped me understand the progress of technology, but it was a blast to see some of the bikes I remember from High School, but the photo's show them in showroom condition (had to get a towel to mop up the drool...). They make great Winter 'reads'. Cheers!
1979 CB750K (sold, 2012, but not forgotten)
1983 Kawasaki 440 LTD Belt Drive (sold, 2011)
1993 Kawasaki Voyager XII