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Honda CB 400SF Super Four

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Make Model

Honda CB 400SF Super Four

Year

1999 - 02

Engine

Liquid cooled, transverse four cylinders, four stroke,

Capacity

399 cc / 24.3 cu in
Bore x Stroke 55 x 42 mm
Compression Ratio 11.3:1

Induction

4x 32mm carbs

Ignition 

CDI
 Starting Electric

Max Power

53 hp / 38.6 kW @ 10000 rpm

Max Torque

40.1 Nm / 29.5 lb-ft @ 7500 rpm
Clutch Wet, multi-plate

Transmission 

5 Speed 
Final Drive Chain

Front Suspension

41mm Telescopic forks

Rear Suspension

Swing arm, Pro-link monoshock

Front Brakes

2x 296mm discs 4 piston calipers

Rear Brakes

Single 240mm disc 2 piston caliper

Front Tyre

110/80-18

Rear Tyre

140/70-17
Wheelbase 1410 mm / 56 in
Seat Height 755 mm / 29.7 in

Wet Weight

200 kg / 440 lbs

Fuel Capacity 

18 Litres / 4.0 US gal

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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.