It's wider than it looks on Google. You can get a move on and the surface is mainly pretty good. Reminds me of the back rounds along the borders to the north of Kielder. I haven't ridden it on the Rocket but I did on the Harley a few times and you can crack on. I've found the Rocket likes flowing roads where you can stay on the power and then you really see how nimble it can be and how much progress the instant supply of shove offers you.
What it's less keen on it start/stop and heavy braking. On the above road you can see through most of the twisty sections because for much of the way the road follows the river, and then you can plan a long way ahead and keep the power on. The Rocket really rewards when ridden like that.
Next time I'm up that way I must revisit the A87 from Glen Moriston to the Kyle of Lochalsh. The Rocket will eat that road alive.