The Z1 had full instrumentation and an electric start, produced 82 bhp and had a maximum speed of 130 mph to 132 mph (210 km/h).

When it was introduced in 1972, Kawasaki marketed the Z1 as the most powerful four-cylinder, four-stroke motorcycle in the world. The 900cc monster is widely regarded as the first genuine Japanese superbike. The Z1 was the fastest production motorcycle in the world in 1973.

Kawasaki motorcycles provide high-quality suspension, superior brakes, ABS, and traction control to deliver speed, power, and maximum control. Kawasaki was also the first Japanese motorcycle to feature traction control, Kawasaki Throttle Ignition Response Control, or K-TRIC.

There is a big problem with the idling which gradually reduces over time. This causes engine overheating issues, poor ride-ability and jerkiness. This issue has been confirmed by multiple people in their respective Z900s making it EXTREMELY common in the Z900. Using high-octane fuel didn't help at all.