Honda CB400F (1977)

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The Honda CB400F motorcycle was released in 1977 with a four-stroke, transverse four-cylinder engine with SOHC and 2 valves per cylinder. It had a capacity of 408cc/24.8cu-in and a compression ratio of 9.4:1. The bike used 4x20mm Mikuni carburetors and a wet sump lubrication system. The ignition was powered by a battery and coil and the bike had both electric and kick start capabilities. The motorcycle had a maximum power output of 37hp/27.5KW @ 8500rpm and a maximum torque of 24 ft-lb/32.5Nm @ 7500rpm. The bike had a six-speed transmission and chain drive with a wet multi-plate clutch. The front suspension consisted of telescopic forks and the rear suspension had dual shocks that were preload adjustable. The bike had a single 267mm disc brake on the front and a 160mm drum brake on the rear. The motorcycle had a top speed of 103mph with a 0-60 acceleration time of 6.70 seconds and could travel 49.7mpg. The wheelbase measured 1355mm/53.3in with a seat height of 790mm/31.1in and a ground clearance of 150mm/5.9in. The bike had a wet weight of 185kg/407lbs and held 14 liters/3.7 US gallons of fuel. The instrumentation included a speedometer with trip, tachometer, oil lamp, and neutral lamp. The Honda CB400F was a popular and powerful motorcycle during its time with both electric and kick start methods and a favorable weight to power ratio.

Technical specifications:

Make Model: Honda CB 400F

Year: 1977


Engine: Four stroke, transverse four cylinder, SOHC, 2 valve per cylinder.
Capacity: 408 cc / 24.8 cu-in
Bore x Stroke: 51 50 mm
Cooling System: Air cooled
Compression Ratio: 9.4:1
Lubrication: Wet sump
Induction: 4x 20mm Mikuni carburetors
Ignition: Battery and coil
Starting: Electric & kick
Max Power: 37 hp / 27.5 KW @ 8500 rpm
Max Toque: 24 ft-lb / 32.5 Nm @ 7500 rpm
Transmission: 6 Speed
Final Drive: Chain
Clutch: Wet multi-plate
Front Suspension: Telescopic forks

Rear Suspension: Dual shocks preload adjustable
Front Brakes: Single 267mm disc
Rear Brakes: 160mm drum
Front Tyre: 3.00-18
Rear Tyre: 3.50-18
Instrumentation: Speedometer with trip, Tachometer, Oil lamp, Neutral lamp
Wheelbase: 1355 mm / 53.3 in
Seat Height: 790 mm / 31.1 in
Ground Clearance: 150 mm / 5.9 in
Wet Weight: 185 kg / 407 lbs
Fuel Capacity: 14 Litres / 3.7 US gal
Fuel Consumption: 49.7 mpg
Standing 1/4: 14.71 sec @ 86.04 mph
Acceleration 0-60: 6.70 sec
Top Speed: 103 mph

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