hamilton crew did this last year on the way to port waikato, good road apart from the random gravel on corners 
Meh, try doing that road on a motorcycle and encountering random gravel on corners . . . sphincter muscles weren't intended to cope with such things.
a bike passed us on that road, i was leading the group of 4 cars, didn't see him till he was right behind me he causght us that quick, then he disappeared in front of me just as quick, i saw one corner and i thought he was gonna lay it down on the road he way leaning so far into it.