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Honda CB 650SC Nighthawk

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Make Model

Honda CB 650SC Nighthawk

Year

1982 - 86

Engine

Four stroke, transverse four cylinder, DOHC, 2 valves per cylinder.(1985 4 valve per cylinder)

Capacity

652 cc
Bore x Stroke 60 x 58 mm
Cooling System Air/oil cooled
Compression Ratio 9.5:1

Induction

4x Keihin 26mm carburetors

Ignition 

Transistorized 
Starting Electric

Max Power

63 hp / 46.3 kW @ 10000

Max Torque

 
Clutch Wet multi-plate

Transmission

6 Speed 
Final Drive Shaft
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
Dimensions Length 2210 mm /87.0 in
Width    780 mm / 30.7 in
Height 1171 mm / 46.1 in
Wheelbase 1509 mm /  59.4 in
Seat Height 780 mm / 30.7 in
Ground Clearance 145 mm / 5.7 in

Wet Weight

219 kg / 483 lbs

Fuel Capacity 

13.6 Litres / 3.6 US gal

Consumption Average

50.4 mpg

Standing ¼ Mile  

14.1 sec / 157.7 km/h
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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.

Road Test Cycle 1982

Nighthawk defined: A bird to steal in the dead of the night.

Once upon a time, a committee at Honda had a pretty intriguing idea. Looking around at cruisers on the one hand and sport bikes on the other, the think-tank members wondered whether they could blend elements of cruiser styling with those from functional sport bikes. The Nighthawk became a bird apart—a functional motorcycle with an arresting appearance. In 1982, the Nighthawk, priced at $2748, was a bargain. Still, the motorcycle looked unusual.

Nineteen-eighty-three stretched the boundaries of taste. Once enthusiasts decided motorcycles didn't have to have a particular look, tastes proved downright eclectic: Shadows, Interceptors, Gold Wings, Magnas, etc.

Beneath the Nighthawk trappings lies Honda's basic eight-valve, single-overhead-cam, four-cylinder 650; this engine has roots in the original 500/550 series which is to say, Honda has more than a decade of experience building these motorcycles. The 650s are as reliable as stones and may last longer.

Think of the 650 Nighthawk as a motorcycle for worriers who hate to worry. Worriers-gather themselves up to full fret at the thought of sixteen-valve engines, secondary radiators, and the possibility that they'll arrive at the parts counter an hour after the last part was sold. Six-fifty Nighthawk owners rest assured that every mechanic who can pronounce the word "Honda" knows something about the CB650.

Although the new-generation 1983 Nighthawk has superseded the eight-valve Nighthawk series, Honda engineers kept the 1982 650 current to the end. The leading-axle front fork carries Syntallic bushings for friction-free action, and Honda's latest front disc brakes with twin-piston calipers are first rate. The front suspension is telescopic adustable: air-adjustable fork. The twin shocks have two-stage rear damp and five spring-preload positions. The handlebar is adjustable, 30mm vertically and 25 degrees horizontally. Nice.

Source Cycle 1982