The scenery and the environment is spectacular but the road surface is awful. On every corner you will find some sand, water, boulders, potholes, fallen trees, gravel and sometimes combination of those. You need to be VERY careful. Keep in mind that you are quite away from a city and cell coverage is limited. If possible prefer an enduro bike.
This is a great road for tourist - enduro motorbikes. There is not graval sections but on some corners could be sand or stones which could surprise you. The highest section is with brand new asphalt but the road is narrow. Neverthless the trafic is in general not present. So the road is all yours.