Kawasaki Z1 vs Honda CB750 — The REAL Speed Difference

The Honda CB750 is often hailed as the first superbike—but Kawasaki’s Z1 wasn’t far behind. Both bikes changed motorcycling forever, but when it comes to raw speed, only one truly led the pack. In 1969, Honda stunned the world with the CB750: four cylinders, front disc brake, and reliability that no custom racer could match. Just four years later, Kawasaki struck back with the Z1—a 903cc powerhouse that could leave the CB750 in its dust. This wasn’t just about style or innovation—it was about who was fastest. Honda had history, Kawasaki had brute force, and their rivalry defined the naked bike era. So what was the real speed difference between these legends? Let’s break it down.