Honda CB400SF

Honda CB400 Super Four

Manufacturer	Honda
Production	1996-
Predecessor	CB400N
Class	Naked bike
Engine	NC42E Water-cooled, 4-stroke, 4 Valve, DOHC inline 4-cylinder
Bore / stroke	55 mm × 42 mm (2.17 in × 1.65 in)
Compression ratio	11.3:1
Top speed	190kph
Power	39 kW (52 hp) @ 11,000 rpm
Torque	39 N·m (29 ft·lb) @ 9,500 rpm
Transmission	6-speed, wet multi-plate clutch, chain drive
Wheelbase	1,410 mm (56 in)
Dimensions	L 2,040 mm (80 in) W 725 mm (28.5 in) H 1,070 mm (42 in)
Seat height	770 mm (30 in)
Fuel capacity	18 L (4.0 imp gal; 4.8 US gal)

The Honda CB400 Super 4 is a naked bike motorcycle produced by Honda at the Kumamoto plant from 1996 to the present. It is available in Japan, South-East Asia and Australia.

History

The bike was introduced in Japan for the 1992 model year. The engine was based around the early CBR400RR and later CB-1 versions, albeit altered quite a bit. To better fit the retro theme, 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.

For 1999, Vtec was introduced in an attempt to improve low- and midrange power. 2008 saw fuel injection and optional ABS added to the list as Honda continued to upgrade the bike.

References

• 2011 Honda CB400 Super Four

http://en.wikipedia.org/wiki/Honda_CB400