The '''Kawasaki EN 400 Vulcan''' was created in 1985 based on the export version of the Kawasaki EN450 Vulcan (Vulcan 454 LTD) and was intended for the domestic Japanese market.

The model EN 400 Vulkan was based on a 2-cylinder in-line liquid-cooled engine with a volume of about 400 cubic meters. cm, delivering 45 hp. power and 33 Nm of torque. The engine was taken almost unchanged from the sports model Kawasaki GPZ400S and was subsequently installed on [[Kawasaki_EX-4 | Kawasaki EX-4]] and [[Kawasaki_KLE400 | Kawasaki KLE 400]]. At that time, the company did not have experience in creating classic cruisers, therefore, they were often based on sufficiently forced engines, delivering record power for a motorcycle of this class. Over time, all Japanese companies came to the correct understanding of the "cruiser" class and updated their models, making them more similar to American classic motorcycles.