For several years nothing could touch an '86-'87 Yamaha Maxim X 700, be it crotch rocket or otherwise, and it's a comfy cruiser. It's a totally manageable bike in daily use, but if you decide you want to fly you'd better hang the f__k on. There aren't that many of them around, but if you can find one I highly suggest it. Even Yamaha's baddest cruiser, the V-Max, couldn't hang with a Maxim X for about half a decade.
If you can find a Jap-spec version, even better. Lots of US Military types brought them back with them after tours in Okinawa, etc. I know one fella that did just that, and holy crap was that bike fast! Nice, comfortable laid-back cruiser disposition, and scary f__king fast when the throttle was opened wide. I personally slaughtered one example of the "legendary" V65 Magna on that bike, and no--it wasn't the same beater I annihilated with my Trans Am on Carpenter Ave in Iron Mountain one night. The one I beat on the Maxim X was in perfect tune, and the rider was probably 25lbs or more lighter than I was.
The bike is a 5-valve-per-cylinder 700cc engine, and in the entire time I was involved with it, it never required servicing.