| MODEL | HONDA CB 400 F FOUR 1977 |
| Year | 1977 |
| Engine Type | Four stroke, transverse four cylinder, SOHC, 2 valves per cylinder |
| Displacement / Capacity | 408 cc / 24.8 cu in |
| Bore X Stroke | 51 x 50 mm |
| Compression Ratio | 9.4:1 |
| Cooling System | Air cooled |
| Max Power | 27.5 kW / 37 hp @ 8500 rpm |
| Max Torque | 32.5 Nm / 24 lb-ft @ 7500 rpm |
| Ignition | Battery and coil |
| Induction | 4x 20 mm Mikuni carburettors |
| Start System | Electric & kick |
| TRANSMISSION SPECS | |
| Lubrication | Wet sump |
| Gear Box | 6 Speed |
| Clutch | Wet multi-plate |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | Tubular steel single-downtube cradle |
| Front Suspension | Telescopic forks |
| Rear Suspension | Swingarm, dual shocks, preload adjustable |
| Front Brakes | Single 267 mm disc |
| Rear Brakes | 160 mm drum |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | 790 mm / 31.1 in |
| Wheelbase | 1355 mm / 53.3 in |
| Ground Clearance | 150 mm / 5.9 in |
| Dry Weight | — |
| Wet Weight | 185 kg / 407 lbs |
| WHEEL SPECS | |
| Front Tyre | 3.00-18 |
| Rear Tyre | 3.50-18 |
| FUEL SYSTEM | |
| Fuel Capacity | 14 Litres / 3.7 US gal |
| Fuel Consumption | 49.7 mpg |
| Top Speed | 165 km/h / 103 mph |
The 1977 CB400F (F2 in North America) was the last year of Honda's little four-cylinder sports bike, with its distinctive four-into-one exhaust and six-speed gearbox. For 1977 the US/Canadian version got higher bars, footrests moved forward, a recessed locking fuel cap and new paint options. It was rev-happy and light-handling but expensive to build, and Honda dropped it in favour of the cheaper CB400T twin.
