Thanks for posting the video. I did the Turakina Valley a couple of years ago on my teenie weenie Honda XR150L. Loved it, thinking of doing it again in a few weeks time from South to North this time.
You can see it on my YouTube channel: Ruapehu Rumble Part 3. https://www.youtube.com/watch?v=MSsZ5dVSZmU
Hope you enjoy.