Hey! - I rode a 3 cylinder Yamaha 750 for 6 years and it was the best bike I ever owned. Shaft drive, with a Windjammer and highway bars - that bike was reliable, and fun! Had to get rid of it in 1990 when I started dragging kids to school on my way to work.
If anyone knows of a good, reasonably priced 750 or 850 cruiser (eg - Honda Magna) in the Houston area, please let me know.
I started with a Yamanah 50 2 cycle scrambler in West Germany in 1970, went to a 1969 Yamaha 200 2 cycle street twin in 1972, a 1973 Honda CD 450 in 1973, back to Yamaha in 1976 with a 360 Enduro, to a very fast, 2 cycle Suzuki T500 twin in 1977.
You must've gotten the good one. All of them I crossed paths with had a habit of frying the center cylinder, and a voracious appetite for camshafts.