If you guy's are serious about breaking the record you need a course where the average speed is high. Boring yes, but breaking the record would be easier if the bikes can handle WOT for 24 hours. Why not hire Calder Park....... LOLOLOLOLOLOLOLOL.
Flat out 80-100km/h for 24hours an true test of engine building and reliability!!! You may find that lapping a typical kart track like phillip island your average speed is lower than at the show grounds and record breaking is unachievable. Even racing at a full sized bike circuit may be the answer.... Broady!!!!