ROK
 

ROK is a 125cc single-cylinder 2 stroke engine by Vortex, with reed valve admission in the crankcase. It is mixture-lubricated and liquid-cooled with integrated water pump. It has got a self-generating digital ignition and an integrated electric starter, which the battery is dedicated to. It is provided with a balancer shaft, which reduces the vibrations. A centrifugal dry clutch makes it possible to keep the engine on even when the kart is still.

JUNIOR ROK
By changing the exhaust manifold, the Rok engine decreases in power from 29Hp to 19Hp. That’s the Junior Rok engine!