The Kawasaki Ninja 1000 is known for its impressive performance and speed. The top speed of the Ninja 1000 can vary depending on various factors, such as rider weight, wind conditions, and modifications. However, in stock form, the Ninja 1000 is capable of reaching speeds of around 155 mph (250 km/h). It features a powerful 1043cc inline-four engine, delivering strong acceleration and high-speed capabilities. Keep in mind that riding at such high speeds should always be done in controlled and legal environments, adhering to local traffic laws and safety regulations.