Honda CB750K3 (1973)

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The Honda CB750K3 is a motorbike from 1973 with a four-stroke transverse four-cylinder SOHC engine. It has a capacity of 736cc and a compression ratio of 9.0:1. The bike is air-cooled and has dry sump lubrication. The induction system has four 28mm keihin carbs, and the ignition uses battery coils. The bike has both electric and kick starting mechanisms, and its maximum power output is 50kW at 8000rpm. The transmission is a five-speed chain drive; the clutch is multi-plate and wet. The frame is tubular steel duplex cradle. The front suspension uses telescopic forks, and the rear suspension is swingarm with dual shocks that are preload adjustable. The bike has a single 296mm disc for the front brake and a 179mm drum brake for the rear. The wheelbase is 1453mm, and the ground clearance is 160mm. The wet weight is 226kg, and the fuel capacity is 17L. Its average consumption is 6.9L/100km, and it has a braking distance of 10m at 30mph and 41m at 60mph. Its top speed is 198km/h, and it comes in three colors: flake sunrise orange, candy buccus olive, or maxim brown metallic.

Technical specifications:

Make Model: Honda CB 750 Four K3

Year: 1973


Engine: Four stroke, transverse four cylinder, SOHC, 2 valve per cylinder.
Capacity: 736 cc / 44.9 cub in.
Bore x Stroke: 61 63 mm
Compression Ratio: 9.0:1
Cooling System: Air cooled
Lubrication: Dry sump
Induction: 4 x 28 mm Keihin carbs
Ignition: Battery, coils
Starting: Electric, kick
Max Power: 50 kW / 67 hp @ 8000 rpm
Max Torque: 44 lb-ft / 60 Nm @ 7000 rpm
Transmission: 5 Speed
Final Drive: Chain
Gear Ratios: 1st 13.99 / 2nd 9.54 / 3rd 7.45 / 4th 6.14 / 5th 5.26:1
Clutch: Multi-plate, wet

Frame: Tubular steel duplex cradle
Front Suspension: Telescopic forks non adjustable.
Rear Suspension: Swingarm, dual shocks, preload adjustable.
Front Brake: Single 296 mm disc
Rear Brake: 179 mm Drum
Front Tyre: 3.25-19
Rear Tyre: 4.00-18
Wheelbase: 1453 mm / 57.2 in.
Seat Height: 800 mm / 31.5 in.
Ground Clearance: 160 mm / 6.3 in.
Wet Weight: 226 kg / 499 lbs
Fuel Capacity: 17 L / 4.5 US gal
Oil Capacity: 3.3 L / 7 US pints
Consumption Average: 6.9 L/100 km / 14.6 km/l / 34.3 US mpg
Braking Distance 48 km/h / 30 mph – 0: 10 m / 32.9 ft
Braking Distance 97 km/h / 60 mph – 0: 41 m / 135.7 ft
Standing 1/4 Mile: 13.5 sec / 100.9 mph
Top Speed: 198 km/h / 123.2 mph
Colours: Flake sunrise orange, Candy bucchus olive, or Maxim brown metallic

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