thanks for the replies guys. bike is new (only had < 2k km on it). i did the same endurance last november on the ktm (from my avatar), chain slack halfway and now i have like an dis proportioned sprocket where sometimes it slack and sometimes it doesnt even if adjusted properly.
i only have traveled the right side of the route. it's city, traffic, then twisties (like one section is a 3hr twisties crossing mountain ranges), no rough road but some unpaved areas (10-50meter) on the mountains due to landslides. we leave at 12midnight.
few days ago they released the gps map, i instead printed the google map.
ad astra per aspera