NMKawirider, you are absolutely wrong on that. I have the race kit and i have test many setting.
The best result are to live the secondary to stock position.
The race kit make the ZForce a lot stronger than just clocking the secondary and with the stock set up on the secondary the engine jump to 7100 rpm on start and slowly climb ton 7600 rpm.
Just perfect!
If you clock the secondary you will it the cut off of 7750 rpm on start.
The race kit is a LOT more agressive and the best is it make the engine very free reving. The engine climb in rpm just as fast as a motocross type engine. A LOT less weight in rotation.
Its by far the best mod for the Z...
You can run with every sxs on a tight trail.