2006 - 2007 Honda CB400 Super Four

Make Model	Honda CB 400 Super Four SF
Year	2006 - 07
Engine	Four stroke, transverse four cylinders, DOHC, 4 valve per cylinder
Capacity	399 cc / 24.3 cu in
Bore x Stroke	55 x 42 mm
Cooling System	Liquid cooled,
Compression Ratio	11.3:1
Induction	4x 32mm carburetors
Ignition	CDI
Starting	Electric
Max Power	53 hp / 38.6 kW @ 11000 rpm
Max Torque	40.1 Nm / 29.5 lb-ft @ 7500 rpm
Clutch	Wet, multi-plate
Transmission	6 Speed
Final Drive	Chain
Frame	High-tension steel cradle frame
Front Suspension	Telescopic forks
Rear Suspension	Single shock
Turning Circle	2.6 m / 8 ft 6 in
Front Brakes	2x 296mm discs 4 piston calipers
Rear Brakes	Single 240mm disc 2 piston caliper
Front Tyre	120/60 ZR17
Rear Tyre	160/60 ZR17
Wheelbase	1410 mm / 56 in
Seat Height	755 mm / 29.7 in
Dry Weight	175 kg
Wet Weight	198 kg / 437 lbs - 203 kg / 448 lbs (ABS)
Fuel Capacity	18 Litres / 4.8 US gal

Model History

The Honda CB400 Super Four is a CB series 399 cc (24.3 cu in) standard motorcycle produced by Honda at the Kumamoto plant from 1992 to the present. The CB400 embodies the typical Universal Japanese Motorcycle produced through the 1970s, updated with modern technology. To this end, the bike has a naked retro design, paired with a smooth inline-four engine. Originally a Japan-only bike, it was later also available in SE Asia, and from 2008 in Australia.

The CB400 Super Four had a similar engine as the early CB-1.

Super Bold'or

Starting in 1999 the CB400 has also been available in Japan with a small headlight fairing, this model is known as the Super Bol D'Or.

1992 - 1999

The CB400 Super Four (1992) was produced between 1992 and 1999 in a variety of colours.
In 1994, minor changes were made to the engine to improve efficiency, a new instrument cluster with fuel gauge in the tachometer was added.

Compared to the CBR400RR, the engine was tilted backwards to obtain a much more erect cylinder bank. Carburetion went from downdraft to sidedraft type, but still CV.

The cylinder head received new mounting lugs to the frame totally different from the original CBR design. Originally fitted with gear cam drive system, the new version of the engine fitted to the CB400SF was outfitted with a more conventional chain drive system. Overall gearing was altered so that the engine turned less rpm in 6th gear compared to the CBR and CB-1. Also, the gearbox received a wider ratio so that while 6th gear was taller, 1st were lower compared to earlier versions of the engine. Redline was set to 12500 rpm for the CB400SF compared to 13500 rpm for the CB-1.

1999 - 2002

The CB400 VTEC (Spec I) (1999) introduced some major engine improvements to the model through the use of the VTEC system. While having four valves per cylinder, below 6750 rpm one exhaust and one intake port are disabled. This technique improved the engines low and mid-range power, while retaining performance at high rpm by resuming four valve operation. The CB400 VTEC (Spec I) also exhibits improved fuel economy, improved handling and suspension and a lower weight than the Super Four.

2002 - 2003

CB400 VTEC (Spec II) (2002) changed the operation of the VTEC system so that four valve operation begins at 6,300 rpm across all gears. This model also introduced some minor engine modifications, as well as adding the HISS ignition security system and a redesigned instrument panel.

2003 - 2007

CB400 VTEC (Spec III) (2003) changed the operation of the VTEC system so that four valve operation begins at 6,300 rpm in gears 1-5 and 6750 rpm in 6th. Other minor improvements were introduced including a lower seat height, the addition of a passenger grab rail in all markets and a change to a LED tail light.

The CB400 VTEC was available as both the Naked CB400 and the partially faired Super Bol D'Or

Honda CB 400SF Super Four