I have ran these same events for several years now. For the bore and cam/s and carbto work to your advantage, a aftermarket header and silencer is needed.
As far as the racing setup goes, you need lowering kits(front and rear) and something wider than the stock axle, but don't run wheel spacers.
My setup handles extremely well and took a while to get it there as I rode Honda previous to my Z and setup is somewhat different.
Good luck and have fun!
z400racing