Did it in Sept 2011, the bad tar downgrades it to a three star rating.
From Stadl take the turn off BS97 in the town and head
southeast towards the Flattnitz ski resort.
The road is well surfaced and has a few interesting bends.
I've done it twice in 1993 and 1999 both times on a GT750
'Kettle', so it was more of a fight for me than it would on
a modern superbike or my current BMW GS!
You can lunch at the Flattnitz resort before continuing
southwards into Carinthia.