Rizoma clutch lever. Studies have shown that at high speeds the air that hits the brake lever could influence to the point of putting pressure on the brake circuit, thus reducing the performance of the motorcycle. After multiple tests in the wind tunnel, this phenomenon was minimized almost perfectly. This important result motivated the realization of the patent of the original design. The careful fine-grained finish and the ergonomic shapes guarantee a fantastic grip feeling. The technology applied for the realization of the levers is of the first level: they have a wide possibility of adjustment, taking advantage of special bushings and specific return springs, to obtain, thus, a greater precision of operation, reliability and duration.