Honda CB400 Super Four Hyper VTEC Spec 3 (III) 2004–2007

2003-2007 Model 400cc Naked Road Sports Bike Honda CB400 Super Four Hyper VTEC Spec-III Engine - Overview, Features, Price & Photos Gallery

Honda CB400 Super Four Hyper VTEC Spec 3
2004 Honda CB400SF VTEC Spec 3 photo.
Body color: blue with gold wheel/rim.

Equipped with the HYPER VTEC SPEC-3 engine, which has been modified from a liquid-cooled, 4-stroke, DOHC, in-line, 4-cylinder, 400cc engine that delivers smooth and powerful output characteristics from low to medium to high revs. The naked road sports bike "CB400 SUPER FOUR", which combines sportiness and ease of handling, will be released from Thursday, December 25th 2003.

The CB400 SUPER FOUR was launched in 1992, and in 1999 it was equipped with the "HYPER VTEC" *1 engine. In 2002, it was equipped with "HYPER VTEC SPEC II", which evolved from this engine, and it is a model that has evolved while being supported by a wide range of people.
Setting changes such as variable timing of the valve are applied to improve ease of handling.
By changing the variable valve timing of the 6th gear, the engine realizes output characteristics that are smooth and easy to handle even in the high rotation range, while adding an independent ignition timing map dedicated to the 6th gear allows linear achieves smooth acceleration.
In addition, the exhaust system has achieved excellent quietness by increasing the amount of sound absorbing material in the exhaust pipe assembly. In addition, the seat height has been lowered by 5mm, and the width of the left and right side covers has been narrowed by approximately 10mm to improve the rider's ability to get the feet on the ground. In addition, in order to further improve usability for two-seaters, aluminum die-cast grab rails are standard equipment, and Honda's original theft deterrent mechanism (H・I・S・S), which has been popular since the previous model, has been adopted.
In addition, 21 patterns are set in the color order plan that allows you to freely select combinations, making it possible to select from a total of 24 combinations.

Main Features of Honda CB400 Super Four Hyper VTEC Spec III

"HYPER VTEC SPEC3 engine" for even better ride comfort

The engine is equipped with a water-cooled, 4-stroke, DOHC, in-line, 4-cylinder, 400cc HYPER VTEC SPEC III engine, an evolution of Honda's original HYPER VTEC II engine. The ignition timing map is divided into a map for 1st to 5th gear and a map for only 6th gear, and the valve switching timing is set to 6,750 rpm only for 6th gear (6,300 rpm for 1st to 5th gear). . In addition, "HYPER VTEC SPECIII" uses the latest ECU. This ECU determines the gear to be used from the engine speed and vehicle speed, and realizes the appropriate ignition timing map and valve switching.

Powerful exhaust sound

The HYPER VTEC SPEC 3 conforms to Japan's Tier 3 noise regulations, suppresses the sound pressure in the high-frequency range that can be heard as noise, and emphasizes the sound pressure in the low-frequency range of the exhaust sound to create a powerful vehicle. Exhaust sound is realized.

Improved comfort for riders and passengers

In order to make it easier for a wide range of riders to handle, the seat height has been lowered by 5mm, and the shape of the seat and side covers have been slimmed down to improve rider comfort. In addition, the seat cover is vacuum-molded in one piece, just like the high-end model, to improve adhesion with the sponge and achieve a beautiful seat shape. In addition, the passenger seat has been expanded forward by 13 mm, and aluminum die-cast grab rails are standard equipment, giving consideration to the usability and comfort of the passenger.

Sharp and dynamic exterior design

The styling inherits the traditional design of the CB400SF, while making it sharper and more dynamic. By boldly laying out Honda's wing mark on the fuel tank, it has been changed to a sharper image (stripe type only). In addition, the tail cowl has been changed to a sharp shape that is effective for aerodynamic characteristics. Combined with the newly adopted LED tail lamps and small turn signals that are highly durable and highly visible from the rear, it creates an image of sharp driving.

By adopting the color order plan, you can choose from a total of 24 combinations

As for the coloring, as a standard plan, two colors of Candy Tahitian Blue and Digital Silver Metallic are used as stripe types, and the solid type is Pearl Prism Black, so a total of three colors are set. In addition, the color order plan has 21 patterns, with a total of 24 possible combinations of 6 body colors, 2 wheel colors, and stripe type or solid type.

Other Equipment

For the headlights, multi-reflectors with excellent visibility are used.


Manufacturer's suggested retail price:

  • Standard Plan : 629,000 yen (2004)
  • Color order plan : 649,000 yen (2004)
  • Two tone type : 682,500 yen or 650,000 yen without consumption tax (model year 2006)

(Regional suggested retail price: Okinawa, excluding some other areas.) (Reference price. Excludes consumption tax.)

Planned sales volume (domestic/annual): 6,000 units

2006 Honda CB400SF Hyper VTEC Spec III
2006 Honda CB400 SF VTEC Spec 3 picture.
Colour: Two-tone tipe, Red+White.

Honda CB400 Super Four Hyper VTEC Spec III Main Specifications

Below the table of specs of Honda CB400 Hyper VTEC Spec-3 model year 2004-2007:

Car name/modelHonda BC-NC39
Length×Width×Height (m)2.040×0.725×1.070
Length (m)1.410
Minimum ground clearance (m)0.130
Seat height (m)0.755
Vehicle weight (kg)190
Dry weight (kg)170
Capacity (persons)2
Minimum turning radius (m)2.6
Engine modelNC23E (water-cooled, 4-stroke DOHC 4-valve in-line 4-cylinder)
Total Displacement (cm3 )399
Inner Diameter x Stroke (mm)55.0×42.0
Compression Ratio11.3
Max output (kW[PS]/rpm)39[53.0]/11,000
Maximum torque (N・m[kg・m]/rpm)38[3.9]/9,500
Fuel consumption rate (km/L)37.0 (60km/h level running test value)
Carburetor modelVP04B
Starting methodSelf-operated
Ignition methodFull transistor battery ignition
Lubrication methodCombined pumping and splashing method
Lubricant capacity (L)3.8
Fuel tank capacity (L)18
Clutch typeWet multi-plate coil spring
Transmission typeConstant mesh 6-speed return
Transmission ratio1 speed3.307
2 speed2.294
3 speed1.750
5 speed1.240
Reduction ratio (primary/secondary)2.171/2.933
Caster (deg)/Trail (mm)25°5´/90
Tire sizeFront120/60ZR17M/C (55W) Radial
Rear160/60ZR17M/C (69W) radial
Brake typeFrontHydraulic double disc
RearHydraulic disc
Suspension systemFrontTelescopic
RearSwing arm type
Frame FormatDouble Cradle
  • * HYPER VTEC is a valve control system based on Honda's unique hydraulically controlled VTEC technology that switches the number of operating valves per cylinder when the engine speed reaches a set speed.
  • ※ H・I・S・S…Honda Ignition Security System


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