Naked Motorcycles
2003Honda CB400 Super Four
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The 2003 Honda CB400 Super Four is a classic four-cylinder roadster, especially popular in Japan. Its liquid-cooled 399cc inline four makes 53 hp and 38 Nm through a six-speed gearbox and chain. A 760 mm seat, 168 kg dry weight and 18-litre tank make it smooth and versatile.
- Capacity
- 399.0 ccm
- Engine
- In-line four, four-stroke
- Gearbox
- 6-speed
- Dry weight
- 168.0 kg
- Seat height
- 760 mm
- Power
- 53.0 HP (39.0 kW)
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- It's built for spirited street riding and weekend backroad carving where its high-revving four-cylinder character and light weight shine more than raw straight-line power.
- Built for
- It rewards riders who enjoy the mechanical sound and smoothness of a small-capacity inline-four spun to high RPM rather than short-shifting for low-end torque.
- Not ideal for
- This isn't the right bike for riders wanting effortless highway overtaking power or long-distance touring comfort with a passenger and luggage.
Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.
Will it fit you?
Worked out in your browser - nothing is sent to usEngine
- Capacity
- 399.0 ccm
- Power
- 53.0 HP (39.0 kW)
- Torque
- 38.0 Nm (3.9 kgf-m)
- Engine type
- In-line four, four-stroke
- Power/weight ratio
- 0.3155 HP/kg (dry)
- Bore x stroke
- 55.0 x 42.0 mm
- Compression
- 11.3:1
- Cooling system
- Liquid
- Fuel system
- Carburettor
- Starting
- Electric
- Ignition
- Full transistor type battery ignition
- Valves per cylinder
- 4
Transmission
- Gearbox
- 6-speed
- Transmission type
- Manual
- Final drive
- Chain
- Clutch
- Wet multi-plate coil spring
Dimensions & weight
- Wheelbase
- 1415 mm
- Overall length
- 2050 mm
- Overall width
- 725 mm
- Overall height
- 1070 mm
- Seat height
- 760 mm
- Dry weight
- 168.0 kg
- Fuel capacity
- 18.00 litres
- Ground clearance
- 130 mm
Brakes & wheels
- Front brakes
- Dual disc
- Rear brakes
- Single disc
- Front tyre
- 120/60-ZR17 55W
- Rear tyre
- 160/60-ZR17 69W
Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.
What changed, year to year
Differences highlighted| Specification | 2002 | 2003 | 2004 | 2011 | 2013 | 2015 |
|---|---|---|---|---|---|---|
| Capacity | 399 cc | 399 cc | 399 cc | 399 cc | 399 cc | 399 cc |
| Dry weight | 168 kg | 168 kg | 168 kg | 194 kg | 195 kg | 195 kg |
| Seat height | 760 mm | 760 mm | 760 mm | 755 mm | 755 mm | 755 mm |
| Fuel capacity | 18 L | 18 L | 18 L | 18 L | 18 L | 18 L |
Illustrative - generated automatically by diffing the year records already on file, not a manufacturer-published changelog.
Rider Reviews
Common questions
What is the engine size of the Honda CB400 Super Four?
The 2003 Honda CB400 Super Four has a Capacity of 399.0 ccm (24.35 cubic inches).
What engine power does the Honda CB400 Super Four have?
The 2003 Honda CB400 Super Four has a Power of 53.0 HP (39.0 kW).
How many gears does the Honda CB400 Super Four have?
The 2003 Honda CB400 Super Four has a Gearbox of 6-speed.
What is the torque of the Honda CB400 Super Four?
The 2003 Honda CB400 Super Four has a Torque of 38.0 Nm (3.9 kgf-m or 28.0 ft.lbs).
How much does the Honda CB400 Super Four weigh?
The 2003 Honda CB400 Super Four has a Dry weight of 168.0 kg (370.4 pounds).
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