We run the last two and just riding a 570 at a constant speed is not going to win the race. The guy in the 570 never lets off of it and tore the front end off on a tree two races ago. U do have to finish to win so it is a compromise to go as fast as you can and still finishing but it is a race and some will not let off.
In our two rounds besides the the mandatory stuff. You will need extra fuel , extra googles . You can pit once for fuel or as often as u need so at least one pit person helps.
Beside all the normal mods to increase reliability , suspension and speed . one of the first modes i would recommend is a extra light bar. (consider amber so it dont reflect in dust) . for the horn i tape a cheap air horn can to grab handle