Roadbooks were good, in english and japanese. The organizers are Japanese, the hosts are Mongolian, then things get translated into english....we got through fine Tip: Find an rally entrant that speaks Japanese and English and become good friends fast.
In addition to the roadbook, they loaded GPS waypoints every 20-30k or so. Just enough GPS info to tell if you were heading off in the wrong direction, but you still had to ride the roadbook as you primary navigation.
I rented a 640 enduro from Gantulga at KTM Tours Mongolia:
He picked us up at the airport, arranged hotels and serviced the bike along the way. Totally turn key.
Rally Mongolia Pics Here
Any other questions, fire away.