It is safe to say Spanner that on the right bike it is very possible with the right support......Development road or OTL. But on the ST1100 you don't have either

. Tyres, suspension, bike frame, water ingress all come into play and with all that plastic to pollute the track with.......heel no !

Adventure/trail bike tour companies have been taking clients up there for years.....
But if you do decide to have a crack at it......the RAN will be off the air those days

We are gradually putting together a vehicle to do the Cape in the future as well as similar destination.....Tyres, Suspension, Vehicle protection and recovery, Communications, load carrying , vehicle reliability and spare parts are all part of the preparation we have done so far.....
But from those who have made the trip the feedback on there experience is
