Across 4 covered model years from 1980 to 1983, the Kawasaki Z 400 J motorcycle has a listed wet/running weight of 463 lb (210 kg).
Kawasaki Z 400 J weight overview
This is firmly on the heavier side. The real penalty is not necessarily normal riding; it is low-speed work, awkward parking and moving the bike around manually.
Heavy Motorcycle
How heavy is the Kawasaki Z 400 J?
wet weight
Using a model-level wet weight comparison, the Kawasaki Z 400 J is heavier than about 51.7% 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 Z 400 J weight & related specs
| Model years covered | 1980, 1981, 1982, 1983 |
|---|---|
| Wet / running weight | 463 lb (210 kg) |
| Engine displacement | 399 cc |
| Power | 27 hp |
| Fuel capacity | 4.36 US gal (16.5 L) |
| Full-tank fuel weight (estimated) | 27.1 lb (12.3 kg) |
Weight changes by model year
Useful weight calculations
| Horsepower per 100 lb | 5.83 hp / 100 lb |
|---|---|
| Pounds per horsepower | 17.15 lb / hp |
| Displacement per pound | 0.86 cc / lb |
| Weight per 100 cc | 116 lb / 100 cc |
| Fuel weight as % of bike weight | 5.9% |
What the weight numbers tell you
Kawasaki Z 400 J weight FAQ
How heavy is the Kawasaki Z 400 J ready to ride?
Listed ready-to-ride weight is 463 lb (210 kg). The year-specific section above shows which years use each figure where the supplied value changes.
Is the Kawasaki Z 400 J heavy compared with other Kawasaki naked bikes?
It sits fairly close to the middle of the category. Its representative wet weight is around the 52nd percentile among 60 compatible Kawasaki naked bikes.
Does the Kawasaki Z 400 J weight change by model year?
Not in the usable weight data on this page. Across the covered 1980-1983 years, the supplied weight figure remains the same where comparable values are available.
How much does the Kawasaki Z 400 J fuel weigh?
The listed tank capacity is 4.36 US gal (16.5 L). Using approximately 0.745 kg/L gasoline, a full tank is roughly 27.1 lb (12.3 kg). That is an estimate for fuel mass, not an official Kawasaki curb-weight calculation.
How heavy is the Kawasaki Z 400 J with an average-size rider?
A 180 lb rider brings the simple bike-plus-rider total to roughly 643 lb (291.6 kg) using the representative wet/running figure. Gear and luggage would add more.
How much horsepower does the Kawasaki Z 400 J have per 100 lb?
Where compatible power and weight figures are available, it works out to 5.83 hp per 100 lb. That places it around the 7th percentile within the compatible Kawasaki naked bike power-to-weight comparison.
How many cc does the Kawasaki Z 400 J have per pound?
Engine displacement relative to bike weight is 0.86 cc per lb. It can help compare motorcycles from very different displacement classes without relying on cc alone.
Will the Kawasaki Z 400 J feel heavy at low speed?
It is heavy enough that smart parking matters. Avoid situations where you have to paddle it backward uphill or catch it after it leans too far.
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.