Norway: Advice on gravel road "Old Postal Road between Alta & Kautokeino"

As in the title, pure gravel road, all 130 km long.
This Route is situated between Alta and Kautokeino in northern Norway.

It's commonly known as the Old Postal road, but is in fact the old mainroad.
The old postal route was actually by boat on the river Kautokeino elva/Alta elva (elva is norwegian for river).

This is the route on Google Maps: Alta, Norge till Kautokeino, Norge - Google Maps

Here are some videos taken from Youtube:

KTM 640 Adventure "Gamla postvägen" between Alta & Kautokeino - YouTube

Alta-Kautokeino - YouTube

Vilse i Norrland - Del 3 / Alta - Kautokeino - YouTube

This "road" is a must if you visit Nordkapp, or my absolute favorite; Knivskjellsodden (Knife-Kjell Cape)...

/Kjell