Honda CB 400SF Super Four

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

2008 - Present

2008: The CB400SF Hyper VTEC Revo introduced Honda's PGM-FI programmed fuel injection and an idle air control valve for improved fuel economy and reliability. Revised engine materials and an integrated crank-case cover reduced the engine weight by 2 kg (4.4 lb). The VTEC operation was further refined such that in gears 1–5 four-valve operation engaged at 6,300 rpm for wide open throttle, otherwise at 6,750 rpm, and remaining at 6,750 rpm in 6th gear. Independent cylinder ignition timing map, revised air intake geometry and a larger stainless steel muffler contribute to fuel efficiency. Updated frame rigidity and engine mounting position improved handling. Optional combined ABS uses three-piston sliding calipers on the front brakes instead of the standard four-piston opposed calipers and a larger 256 mm rear brake disc. Weight increased by 4 kg (8.8 lb), and 9 kg (20 lb) with ABS.

2014

Central LCD screen with gear position, fuel consumption, thermometer and heater level for the handle grips (available with the "E Package"), 10-spoke wheels, round mirrors and dual grab rails on a revised rear cowl with LED rear lights and clear lens. Revised frame geometry brought the handlebars 10 mm higher and 7 mm closer to the rider, and also reduced the rise angle of the tail end, both changes resulting in a more upright riding position. Revised half-fairing with LED headlight for the Super Bol d'Or. Weight increased by 3 kg (6.6 lb).

Genuine accessories available from Honda include a rear carrier storage box that installs in place of the dual grab rails, a 12V power socket that plugs into the wiring harness, and a central stand.

2018

25th anniversary model of Honda's PROJECT BIG 1 (SuperFour since 1992), smaller 2-chamber muffler and updated throttle bodies to comply with emissions regulations, also increased the maximum power to 41 kW (55 hp). LED headlight, updated front and rear suspension, right-angle tyre valve stems, and push type helmet lock bracket. Super Bol d'Or is available with ABS only. Weight increased by 2 kg (4.4 lb).