| MODEL | HONDA CB 750 KZ 1978 |
| Year | 1978 |
| Engine Type | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder |
| Displacement / Capacity | 748 cc / 45.6 cu in |
| Bore X Stroke | 62 x 62 mm / 2.4 x 2.4 in |
| Compression Ratio | 9.0:1 |
| Cooling System | Air cooled |
| Max Power | 57 kW / 77 hp @ 9000 rpm |
| Max Torque | 65 Nm / 6.6 kgf-m / 48 lb-ft @ 7000 rpm |
| Ignition | Electronic |
| Induction | 4 x 30 mm Keihin carburettors |
| Start System | Electric |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 5 Speed |
| Clutch | — |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | — |
| Front Suspension | Telescopic forks, 160 mm / 6.3 in travel |
| Rear Suspension | Swinging arm, dual shocks, 101.5 mm / 4.0 in travel |
| Front Brakes | Dual discs |
| Rear Brakes | 180 mm drum |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | 798 mm / 31.4 in |
| Wheelbase | — |
| Ground Clearance | — |
| Dry Weight | 236 kg / 520 lbs |
| Wet Weight | 255 kg / 562 lbs |
| WHEEL SPECS | |
| Front Tyre | 3.25-19 |
| Rear Tyre | 4.00-18 |
| FUEL SYSTEM | |
| Fuel Capacity | 20 Litres / 5.3 US gal |
| Fuel Consumption | 6.0 L/100 km / 16.6 km/l / 39 US mpg |
| Top Speed | 200 km/h / 125 mph |
The KZ introduced Honda's new twin-cam, sixteen-valve 748 cc engine into the CB750K, replacing the long-running single-cam design. Aimed at sports-touring riders, it kept the four-pipe exhaust and a comfortable riding position while adding more power and smoothness. Road testers liked the refined engine and its value, but criticised the seat, limited ground clearance and brake fade.
