Rode a 01 FXDX to Vegas and back, and came back thru 120 in yosemite. This is Harleys sport touring bike with adjustable spring preload, rebound, and compression both front and back (no compression back) Has higher ground clearance and dual disc brakes. While it is nowhere near the performance of a street bike, that ride taught me that there are some Harleys that handle very well for their size, weight, and older technology. I was carving those turns with precision, lots of lean angle, smoothness, and fun. Probably faster than most average street bike riders.
it was just as fun if not more fun than a street bike and I didn't feel like a douchebag on a clown bike with a screaming kazoo exhaust hanging all off the bike.
Whats even better is that there are plenty of suspension mods for these bikes including racetech gold valves/cartridges for the front forks, and fully adjustable custom tuned remote reservoir rear shocks from Ohlins or Works.