My buddy and I just finished 191 last week on two Harleys. Frankly, we were disappointed. The pavement quality was abysmal and there were few places to pull over to admire the scenery. Literally a road to nowhere. It was only when we got to Hannagan Meadow that the road surface improved enough for us to relax. We found US 60 through the Salt River Canyon to be a much better ride. Wrong bikes for the job I guess. Maybe if we'd been on a couple of KLR's or something.