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Honda CB 650SC Nighthawk

Make Model	Honda CB 650SC Nighthawk
Year	1984 - 85
Engine	Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder.
Capacity	656 cc / 39.9 cu-in
Bore x Stroke	60 x 58 mm
Cooling System	Air/oil cooled
Compression Ratio	9.5:1
Induction	4x Keihin 32mm carburetors
Ignition	Transistorized
Starting	Electric
Max Power	72 hp / 53.7 kW @ 9500 rpm
Max Torque	54 Nm / 40 lb-ft @ 8000 rpm
Clutch	Hydro activated, wet plate
Transmission	6 Speed
Final Drive	Shaft
Gear Ratios	1st 2.769 (16.41) 2nd 1.85 (10.96) 3rd 1.429 (8.47) 4th 1.154 (6.84) 5th 0.966 (5.72) 6th 0.821 (4.86)
Frame	Tubular steel full cradle
Front Suspension	Showa air-spring, 39mm stanchion tube diameter, brake-actuated hydraulic anti-dive
Rear Suspension	Dual Showa shocks, 5-way adjustable spring preload, 4-way adjustable rebound damping
Front Brakes	2x 275mm discs 2 piston calipers
Rear Brakes	180mm Drum
Front Tyre	100/90 -19
Rear Tyre	130/90 -16
Steering Head Angle	61.5°
Trail	98 mm / 3.8 in
Dimensions	Length 2140 mm / 84.3 in Width 805 mm / 31.7 in
Wheelbase	1461 mm / 57.5 in
Seat Height	790 mm / 31.1 in
Ground Clearance	145 mm / 5.7 in
Dry Weight	197 kg / 434 lbs
Wet Weight	210 kg / 463 lbs
Fuel Capacity	12.9 Litres / 3.4 US gal
Consumption Average	50.4 mpg
Standing ¼ Mile	13.29 sec / 157.7 km/h
Top Speed	122 mph / 196 km/h

The CB650SC (also called the Nighthawk 650) is a Honda standard motorcycle sold in the US from 1982 to 1985.

In 1982, the Nighthawk replaced the Custom of the previous years and featured a re-designed tank and side covers. In 1983-1985 a new DOHC engine replaced the SOHC engine used from 1979-1982. The new engine had hydraulic valve lash adjusters and was rubber mounted. This year also saw the move from chain drive to shaft-drive for this model.

1983 to 1985 Models:

It came in one of two colors: Pearl Siren Blue or Candy Wineberry Red
The headlight and instruments were rectangular
The exhaust system was a 4-into-2
The forks had the "TRAC" anti-dive system
The emblem was located above the axle
The speedometer numbers were marked in increments of 10 (i.e, 10, 20, 30, 40, etc.)
The engine used hydraulic valve adjusters and clutch.