Wanted to get to Route 1 between the closed sections and this part and absolute beast! The surface was a tad rough, so maybe not for your racing bike, but the infinite flow of corners just blew my mind. Got the 1200GS in 3rd and just gas on, gas off, rear break, repeat...
Pfeiffer canyon bridge was still closed (5days to go) but this detour was totally worth it! Bunch of sections with narrow curvy roads with some surface damages, but almost noone on the road. Make sure to have enough gas to get through, as there are no stations for a good 30-40 miles
If you want to avoid the busy E73, this is a good alternative. Mostly just scenic, but some parts are proper fun cornering. Road surface is spotty, but takes 100-110kmh on BMWs... probably not a great idea with sportbikes.
Fast paced, long corners. 2 lanes uphill, 1 down. Just ignore the speed limits. Surface is consistently decent, not new, but not patchwork either. Beautiful landscape both ways.
Recently replaces road surface, some very nice cornering parts. The rest is cruising and enjoying the view.