Straight from KHI's website
The engine will be a Kawasaki trademark liquid-cooled, DOHC In-Line Four. Using a Ram Air System developed through racing feedback from the ZXR-7 and the ZX-7RR, we have been able to achieve a remarkable level of power. The engine displacement is less than 990 cm3, per the new FIM regulations. Compared to the streamlined shape of our current Superbike, the new machine's angular lines were developed using an aerodynamic approach that aims to eliminate turbulent airflow through the use of its strategically located edges.