Across 6 covered model years from 1978 to 1983, the Honda CB 400 N motorcycle has supplied wet/running weights ranging from 405.7 lb (184 kg) to 407.9 lb (185 kg).
Honda CB 400 N weight overview
The bike falls into a normal middleweight range. At road speed the mass is usually less obvious; parking, slopes and walking-speed maneuvers are where you notice it most.
Middleweight Motorcycle
How heavy is the Honda CB 400 N?
wet weight
Using a model-level wet weight comparison, the Honda CB 400 N is lighter than about 66.9% of 77 Honda sport bikes with compatible weight data.
Ready-to-ride weight range
Bike + rider total weight
These totals use the model’s representative wet weight. They exclude riding gear, luggage and a passenger.
Honda CB 400 N weight & related specs
| Model years covered | 1978, 1979, 1980, 1981, 1982, 1983 |
|---|---|
| Wet / running weight | 405.7 lb (184 kg) to 407.9 lb (185 kg) |
| Engine displacement | 395 cc |
| Power | 40 hp |
| Fuel capacity | 3.7 US gal (14 L) |
| Full-tank fuel weight (estimated) | 23 lb (10.4 kg) |
Weight changes by model year
The 1978 model is used as the baseline where data is available. Only later supplied values that differ are shown below. A year pill does not mean every individual weight field was supplied for that year.
Useful weight calculations
| Horsepower per 100 lb | 9.81 hp / 100 lb |
|---|---|
| Pounds per horsepower | 10.2 lb / hp |
| Displacement per pound | 0.97 cc / lb |
| Weight per 100 cc | 102.7 lb / 100 cc to 103.3 lb / 100 cc |
| Fuel weight as % of bike weight | 5.6% to 5.7% |
What the weight numbers tell you
Honda CB 400 N weight FAQ
What is the Honda CB 400 N wet weight?
The supplied wet/running weight is 405.7 lb (184 kg) to 407.9 lb (185 kg) across the model years covered here. That figure is the most useful available number for real-world handling because operating fluids and fuel are included.
Is the Honda CB 400 N lighter or heavier than other Honda sport bikes?
It is comparatively light for this Honda category. The model lands near the 33rd percentile for weight in the compatible dataset.
Which Honda CB 400 N years have different weight specs?
The supplied data shows different weight figures across the 1978-1983 model years. Use the year-specific changes section above for the exact value attached to each changed year.
How much does a full tank add to the Honda CB 400 N?
Based on the supplied 3.7 US gal (14 L) tank capacity, the gasoline itself weighs about 23 lb (10.4 kg) when full. On models with a wet/running weight, that fuel mass is already included in the listed ready-to-ride figure.
What is the combined Honda CB 400 N and rider weight?
Using the model’s representative wet/running weight and a 180 lb rider, the combined bike-and-rider mass is about 587.9 lb (266.6 kg) before riding gear, luggage or a passenger.
What is the Honda CB 400 N power-to-weight ratio?
Available model-year data produces 9.81 hp per 100 lb. It shows engine output relative to motorcycle mass rather than just quoting peak horsepower. That places it around the 35th percentile within the compatible Honda sport power-to-weight comparison.
How much of the Honda CB 400 N total weight comes from fuel?
The calculated full-tank fuel mass is about 5.6% to 5.7% of the listed motorcycle weight. Because the available basis is wet/running weight, that fuel is already included in the ready-to-ride figure.
What is the Honda CB 400 N engine-size-to-weight ratio?
The available figures work out to 0.97 cc per lb. This is not a performance rating, but it is a useful way to compare engine size against total motorcycle mass.
How far is the Honda CB 400 N from the median Honda sport bike weight?
Compared with the median Honda sport bike weight of 436.5 lb (198 kg), the model is roughly 28.7 lb (13 kg) lighter.
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 Honda Powersports website.