The goal of the KG 505 fairing kit is to reduce aerodynamic drag in order to increase the penetration of the kart and driver.
Another, not secondary, goal is to have a more linear air flow in the air intake silencer, radiator and brakes area, which mean improved engine and braking system performance on the kart. The above had to take into account the stringent crash tests imposed by the Federation to ensure the safety and effectiveness of the protections in the event of an accident.