| MODEL | HONDA CB 550K FOUR 1974 - 1978 |
| Year | 1974 - 1978 |
| Engine Type | Four stroke, transverse four cylinder, SOHC, 2 valves per cylinder |
| Displacement / Capacity | 544 cc / 33.1 cu in |
| Bore X Stroke | 58.5 x 50.6 mm |
| Compression Ratio | 9.0:1 |
| Cooling System | Air cooled |
| Max Power | 36.5 kW / 50 hp @ 8500 rpm |
| Max Torque | 43.1 Nm / 31.8 lb-ft @ 7400 rpm |
| Ignition | Battery and coil, contact points |
| Induction | 4x 22 mm Keihin carburettors |
| Start System | Electric & kick |
| TRANSMISSION SPECS | |
| Lubrication | Wet sump |
| Gear Box | 5 Speed |
| Clutch | — |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | Tubular steel double cradle |
| Front Suspension | 35 mm telescopic hydraulic fork |
| Rear Suspension | Dual shocks, adjustable preload |
| Front Brakes | Single 270 mm disc |
| Rear Brakes | Drum |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | 805 mm / 31.7 in |
| Wheelbase | 1405 mm / 55.3 in |
| Ground Clearance | — |
| Dry Weight | 191 kg / 421 lbs |
| Wet Weight | 206 kg / 454 lbs |
| WHEEL SPECS | |
| Front Tyre | 3.25-19 |
| Rear Tyre | 3.75-18 |
| FUEL SYSTEM | |
| Fuel Capacity | 16 Litres / 4.2 US gal |
| Fuel Consumption | — |
| Top Speed | — |
This page covers the full CB550K run from the 1974 K0 to the 1978 K4, with only minor revisions along the way. The four-pipe K was valued as one of Honda's best-balanced 1970s fours, lighter and more nimble than the CB750, before the CB650 replaced it for 1979.
