The 1977 Yamaha XS360D2 was the first bike I ever purchased back in 2004 at 16 with 2900 miles on the clock. The price was 550 from a local dealer in a small town in northeast iowa. It was pretty clear it needed carb work right from the start as most of this age will by now. It was the blue one with spoke wheels, front disc, kick starter, and points ignition. Aftermarket emgo megaphone mufflers were also fitted and were plenty quiet.
I wish I had the jetting skills I have now because it seemed as though it could have been a very nice little bike. All I could do was clean the carbs back then and they were stupid lean even before I fitted foam filters. Starting was always hard. I would often run the battery down to nothing (probably weak to begin with) then continue with the kick starter until it popped off. I suspect the starter was just a bit too slow, or the idle circuit was just a bit too long (lets out way up on the top side of the carbs) also often resulting in stalls on takeoff. That said, it always idled nice once running and ran well with few flat spots besides the lean top end (my own fault). Because of this fuel economy was amazing at 60mpg+ but I often struggled to do 65. I still put over 6000 miles on it in one summer and always got compliments and questions wherever I went. When you're a kid on a metric bike from the seventies everyone notices.
Handling was steady enough to enable full speed back road riding if I so desired, and at 17 and stupid I often did. The bike was also very light and I only dumped it once trying to do a u-turn on crushed rock. Ah, fond memories of learning hard lessons. I didn't get burned too bad and was actually able to lift it off my leg. The engine was a parallel twin with a 180 crank and no balancer, oddly enough. Top end was SOHC, 2 valves per cylinder and tappet type adjusters (no shims required). Something about the sound drove dogs completely mad. Weirdest thing I've ever seen and I've heard others say the same thing.
Shifting was always smooth with the exception of a somewhat remote feel to the clutch. This again, could also have been down to poor maintenance (cables) but it made it a bit hard to find neutral sometimes. Suspension was also pretty soft but it mattered less to me back then. All in all it was a high quality, stable, tough, little bike that would have been dead easy to maintain. Had I been as handy back then, it would probably have been a good performer too.