Yes, registration for riding is capped at 600 riders to make sure we don't get overrun with riders on the tracks.
There is no cap on entry to the event as a whole, spectators or people who want to bring their bikes along to show off. The more the merrier.
A warning - if you haven't registered yet, don't delay any longer. The event is not far away now and is now over 75% full in terms of rider registrations.
DO NOT JUST TURN UP AND EXPECT TO BE ABLE TO REGISTER FOR RIDING AT THE EVENT.
IT WILL NOT HAPPEN AND YOU WILL BE DISAPPOINTED.