The Yamaha R15 V4 Dark Knight is a special edition of the Yamaha R15 V4, which is a lightweight and powerful sports bike. It has a sleek, aerodynamic design and a powerful engine that can reach speeds of up to 180 km/h. It has a unique matte black finish, which is why it is nicknamed the 'Dark Knight'. The bike also features an advanced suspension system that offers superior handling. The Yamaha R15 V4 Dark Knight is a perfect choice for those who want an agile and stylish sports bike.