Across 6 covered model years from 1978 to 2024, the Kawasaki Z400 motorcycle has a listed wet/running weight of 363.8 lb (165 kg).
Kawasaki Z400 weight overview
This is neither unusually light nor extremely heavy. For most riders the practical weight question is more about seat height, center of mass and low-speed balance than the scale number alone.
Middleweight Motorcycle
How heavy is the Kawasaki Z400?
wet weight
Using a model-level wet weight comparison, the Kawasaki Z400 is lighter than about 84.2% of 60 Kawasaki naked bikes with compatible weight data.
Ready-to-ride weight
Bike + rider total weight
These totals use the model’s representative wet weight. They exclude riding gear, luggage and a passenger.
Kawasaki Z400 weight & related specs
| Model years covered | 1978, 2020, 2021, 2022, 2023, 2024 |
|---|---|
| Wet / running weight | 363.8 lb (165 kg) |
| Engine displacement | 399 cc to 400 cc |
| Power | 45 hp |
| Torque | 28 lb-ft (38 Nm) |
| Fuel capacity | 3.7 US gal (14 L) |
| Full-tank fuel weight (estimated) | 23 lb (10.4 kg) |
Weight changes by model year
Useful weight calculations
| Horsepower per 100 lb | 12.37 hp / 100 lb |
|---|---|
| Pounds per horsepower | 8.08 lb / hp |
| Torque per 100 lb | 7.7 lb-ft / 100 lb |
| Displacement per pound | 1.1 cc / lb |
| Weight per 100 cc | 91.2 lb / 100 cc |
| Fuel weight as % of bike weight | 6.3% |
What the weight numbers tell you
Kawasaki Z400 weight FAQ
How heavy is the Kawasaki Z400 ready to ride?
Listed ready-to-ride weight is 363.8 lb (165 kg). The year-specific section above shows which years use each figure where the supplied value changes.
Is the Kawasaki Z400 heavy compared with other Kawasaki naked bikes?
It is on the lighter side in this dataset. Its representative wet weight sits around the 16th weight percentile among 60 Kawasaki naked bikes, meaning most compatible models are heavier.
Does the Kawasaki Z400 weight change by model year?
Not in the usable weight data on this page. Across the covered 1978, 2020, 2021, 2022, 2023, 2024 years, the supplied weight figure remains the same where comparable values are available. No usable dry/wet figure was supplied for 1978, 2024.
How much does the Kawasaki Z400 fuel weigh?
The listed tank capacity is 3.7 US gal (14 L). Using approximately 0.745 kg/L gasoline, a full tank is roughly 23 lb (10.4 kg). That is an estimate for fuel mass, not an official Kawasaki curb-weight calculation.
How heavy is the Kawasaki Z400 with an average-size rider?
A 180 lb rider brings the simple bike-plus-rider total to roughly 543.8 lb (246.6 kg) using the representative wet/running figure. Gear and luggage would add more.
How much horsepower does the Kawasaki Z400 have per 100 lb?
Where compatible power and weight figures are available, it works out to 12.37 hp per 100 lb. That places it around the 46th percentile within the compatible Kawasaki naked bike power-to-weight comparison.
How much torque does the Kawasaki Z400 have per 100 lb?
The calculated torque-to-weight range is 7.7 lb-ft per 100 lb. It is useful for comparing bikes with very different overall weights.
What is the Kawasaki Z400 displacement per pound?
Engine displacement relative to bike weight is 1.1 cc per lb. It can help compare motorcycles from very different displacement classes without relying on cc alone.
What is the Kawasaki Z400 weight difference versus the category median?
The model sits about 98.1 lb (44.5 kg) lighter than the compatible median Kawasaki naked bike weight used on this page.
Motorcycle specifications can vary by model year, market, equipment and the exact dry/curb-weight definition. Calculated fuel-weight and ratio figures on this page are estimates derived from the supplied specifications. Confirm critical figures in the owner’s manual or on the official Kawasaki website.