Honda CB750KZ (1977-78)

The Honda CB750KZ is a classic motorcycle model from the late 1970s with a four-stroke, transverse four-cylinder, SOHC engine that has a capacity of 736cc. It features four 28mm Keihin carburetors, a dry sump lubrication system, and a 5-speed transmission with a chain final drive. The bike has a maximum power of 50kW/67hp at 8000 rpm and a maximum torque of 60Nm/44lb-ft at 7500 rpm. The frame is made of tubular steel duplex cradle and has telescopic forks for the front suspension and swingarm with dual shocks for the rear suspension. The front brake is a single 296mm disc while the rear brake is a 179mm drum. The CB750KZ has a 19L/5.0 US gal fuel tank capacity, and the bike weighs 231kg/408lbs. The bike is capable of a top speed of 198 km/h (123.2 mph) and has a fuel consumption average of 6.9 L/100 km (14.6 km/l, 34.3 US mpg). The bike is available in Candy Alpha red and Excel black, and it has a standing 1/4-mile time of 13.5 seconds at 100.9 mph. The bike has a wheelbase of 1495 mm/58.9 in and a seat height of 810 mm/31.9 in.

Technical specifications:

Make Model: Honda CB 750 Four K7/ K8

Year: 1977 – 78
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: 9.2:1
Cooling System: Air cooled
Lubrication: Dry sump
Induction: 4 x 28 mm Keihin carburetors
Ignition: Battery, ignition coil
Spark Plug: NGK D8ES-L, NDX 24 ES
Starting: Electric, kick
Max Power: 50 kW / 67 hp @ 8000 rpm
Max Torque: 60 Nm / 6.1 kgf-m / 44 lb-ft @ 7500 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
Front Wheel Travel: 141.5 mm / 5.6 in.
Rear Suspension: Swingarm, dual shocks, preload adjustable.
Rear Wheel Travel: 101.6 mm / 4.0 in.
Front Brake: Single 296 mm disc
Rear Brake: 179 mm Drum
Front Tyre: 3.25-19
Rear Tyre: 4.00-18
Rake: 28 degrees
Trail: 115 mm / 4.5 in
Dimensions: Length: 2280 mm / 89.8 in. Width: 880 mm / 34.6 in. Height: 1185 mm / 46.7 in.
Wheelbase: 1495 mm / 58.9 in.
Seat Height: 810 mm / 31.9 in.
Ground Clearance: 150 mm / 5.9 in.
Wet Weight: 231 kg / 408 lbs
Fuel Capacity: 19 L / 5.0 US gal
Reserve: 4 L / 1.1 US gal
Oil Capacity: 3.5 L / 3.7 US quarts
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: Candy Alpha red, Excel black
Article: Kevin Dean, Real Classic