Hi,
in a German Motorcycle newspaper,they tested the Crossuner over 10.000Km with different tyres an accessoires.
About he tyres...the Crossrunner seems to be a bike,which has a excellent handling on all tyres,bute here some examples:
Pirelli Scorpion Trial (Original)
Michelin Pilot Road 3 (best in the rain)
Metzeler Roadtec Z8 Interact (seems to be the best chose for the Crossy)
Dunlop Sportsmart (sport tyre,also very good)
During 12000 Km test distance no drop of additional Oil was needed

.
If I interprated right,the Test Journalists like the Crossy very well and they fight for a ride in the evening or on a bigger travel

Br
Guido