The Kawasaki Ninja 400 has a top speed that is typically around 105-110 mph (170-177 km/h) under optimal conditions. However, it's important to note that top speed can be influenced by various factors such as rider weight, riding position, wind resistance, and road conditions.
The Ninja 400's performance is more notable in its acceleration and agility rather than top speed. With its 400cc parallel-twin engine, the Ninja 400 offers quick acceleration and responsiveness, making it enjoyable for spirited riding and maneuvering through traffic. It strikes a balance between performance and manageable power, which is often appealing to beginners and riders looking for an agile sportbike.