I have ridden that road from one end to the other numerous times. The biggest problem there is not the curves or the scenery, it is trying to stay below the speed limit. Almost all the curves are gentle sweepers that even the most evil handling bike I owned would have no trouble taking at 70 mph. There are a couple of decreasing radius turns but, even at their tightest, are nothing a competent rider should not be able to handle at well above the 45 mph limit. Law enforcement is scarce at best and easy to spot. My normal goal there is to average 50 without going over 60 which sounds simple until you try it. A moving average isn't too hard but you will need fuel which will kill your average. It is much harder than it looks and brakes are a big no no. The rangers will not hassle you at 50, you might get a flash of the wig wags but they aren't gonna turn around and chase you, 60 might get you a ticket though and they are expensive.