did a bit over 1200km's twice at he speed limit. my only suggestion is rest up alot the couple of days before u do it. get yor self a camelback hydration system and keep your fluids up. alot of people that do big stints on a bike seem to forget they sweat alot and smashing a 600ml bottle of water at fuel stops just wont cut it. if you keep hydrated and have small snacks along the way and decnt no fatty ligt meals regularly you will be right doing long days riding. come back to doing anything physically exherting for long periods of time
Regards
Dan
Dan