Among the things on which the OTK Kart Group's Engine Division's research and development department focused, there are two that stand out the most. On the one hand, much work has been done on the type of crankcase cooling; actually, while in the RTZ engine was featured by forced air cooling, in the new VTZ it is water cooling.
Moreover, the Vortex staff focused on the evolution of the engine exhaust and, more specifically, on the muffler, which underwent a total reshape that resulted in a completely new design, specific to this engine model.
