Categories: Honda

Honda CB550SC Nighthawk (1982)

The Honda CB550SC Nighthawk is a motorcycle produced in 1982, equipped with a four-stroke, transverse four-cylinder engine with a capacity of 572 cc. The bike features a Keihin CV induction system and a transistorized ignition, with a maximum power output of 75 horsepower at 9500 rpm and a maximum torque of 36.5 Nm at 8000 rpm. The hydraulic multi-plate wet clutch is paired with a six-speed transmission and a shaft-powered final drive.

The front suspension consists of a telescopic fork with a 160mm wheel travel, while the rear suspension features a swingarm with 104mm wheel travel. The bike has a 29.0-degree rake, 107mm trail, 1440mm wheelbase, and weighs 206.8kg with a fuel capacity of 12.1 Litres. The bike uses a single 320mm disc brake on the front and a 160mm drum brake on the rear, with a tire size of 100/90-19 in the front and 130/90-16 in the back. The consumption average of the bike is 41 miles per gallon, and it can reach a top speed of 186.6 km/h or 116 mph, with a standing 1/4 mile time of 12.6 seconds at 102 mph.


Technical specifications:

Make Model: Honda CB 550SC Nighthawk

Year: 1982-

Engine: Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder.

Capacity: 572 cc / 34.9 cu-in



Bore x Stroke: 60 x 50.6 mm

Cooling System: Air cooled

Compression Ratio: 9.5:1

Induction: 4x 30mm Keihin CV

Ignition: Transistorized

Starting: Electric

Max Power: 75 hp / 54 jW @ 9500 rpm

Max Torque: 36.5 Nm / 26.9 ft-lb @ 8000 rpm

Clutch: Hydraulic multi-plate wet clutch

Transmission: 6 Speed

Final Drive: Shaft

Front Suspension: Telescopic fork. 160mm wheel travel.

Rear Suspension: Swing arm, 104mm wheel travel.


Front Brakes: Single 320mm disc

Rear Brakes: 160mm Drum

Front Tyre: 100/90 -19

Rear Tyre: 130/90 -16

Rake: 29.0 degrees

Trail: 107 mm / 4.2 in

Wheelbase: 1440 mm / 56.7 in

Wet-Weight: 206.8 kg / 456 lbs

Fuel Capacity: 12.1 Litres / 3.2 US gal

Consumption average: 41 mpg


Standing 1/4 Mile: 12.6 sec / 102 mp/h

Top Speed: 186.6 km/h / 116 mph
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