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webbike·
Sportbike
··3 min read

Honda Nighthawk 700 (CB700SC) Motorcycles

1984 CB700SC’84 Nighthawk “S”

Engine
Engine Type Four-stroke, transverse four cylinders; air-cooled with two chain-driven overhead camshafts (DOHC)
Bore and Stroke 67.9 mm x 49.4 mm
Valves 4 valves/cylinder
Displacement 696cc (42.5 cu. in.)
Compression Ratio 9.3:1
Fuel Delivery (4) Keihin 31 mm constant-vacuum
Ignition System Battery-powered, inductive, magnetically triggered
Exhaust system Four into two
Air filtration Disposable paper element
Oil filtration Disposable paper element (Fram PH6010A)
Oil capacity 2.8 litres (2.9 qt)
Horsepower 80 hp (59.7 kW) @ 10000 rpm
Maximum Torque 61 Nm (45 ft. lbs) @ 8000 rpm
Electrical Power source Three-phase AC generator, 280 watts
Charge control Solid-state voltage regulator
Battery 12V / 14AH

DRIVETRAIN
Transmission 6-speed, constant-mesh, wet clutch
Final Drive Straight-cut gear; 73/41, 1.78
Secondary drive Bevel gear; 19/16, 1.19
Final drive Shaft and bevel gears; 34/10, 3.40
Transmission gear ratios
  • (1) 38/17, 2.24
  • (2) 34/22, 1.55
  • (3) 31/25, 1.24
  • (4) 28/27, 1.04
  • (5) 26/30, 0.87
  • (6) 24/32, 0.75
Final gear ratios
  • (1) 16.13
  • (2) 11.16
  • (3) 8.93
  • (4) 7.49
  • (5) 6.26
  • (6) 5.40

CHASSIS / SUSPENSION / BRAKES
Chassis Type Double-downtube, full-cradle frame; tube/box-section steel swing arm
Front Suspension Center-axle, air-adjustable fork with 39mm tubes, anti-dive valving and 6.3 in. (160mm) of travel
Rear Suspension Two shock absorbers, adjustable for spring preload and rebound damping, producing 4.7 in. (120mm) of rear-wheel travel
Front Tire 110/90-16 Bridgestone Mag Mopus G511
Rear Tire 130/90-16 Bridgestone Mag Mopus G508
Front Brakes Hydraulic, dual-disc with twin-piston calipers
Rear Brakes Rod-actuated single leading shoe drum

DIMENSION
Rake/trail 30.0 deg/4.8 in. (122mm)
Wheelbase 1485 mm (58.5 inches)
Front Wheel Cast, 2.50 x 16
Rear Wheel Cast, 3.00 x 16
Seat height 806mm (31.8 in.)
Ground clearance 133mm (5.3 in.)
Fuel capacity (main/reserve) 13.5/2.5 litres (3.6/0.7 gal. US )
Curb weight (full tank) 234.1 kg (516 lb.)
Dry weight (without fluids): 213 kg (469.6 pounds)
Headlight beams (high/low) 60/55 watts
Tail/stoplights 8/24 watts

OTHER
Color
  • Black with Red
  • Black with Blue
  • The color panels were on the tank, side covers, rear fender, and fairing
  • The color panels were outlined with a color matching pinstripe
  • The left side fork leg was black with a white “TRAC” logo
  • The serial number began JH2RC200*EM000014.

1985 CB700SC’85 Nighthawk “S”

  • It came in one of two color schemes: Black with Red or Black with Blue
  • The color panels were outlined with white pinstripes
  • The left side fork leg was solid black
  • The speedometer numbers were in increments of 10 (e.g., 15, 25, 35, 45, etc.)
  • The engine was a 696cc DOHC 4-valve inline four linked to a 6-speed transmission and driving a shaft to the rear wheels
  • The serial number began JH2RC200*FM100001.

1986 CB700SC

  • It came in one of two color schemes: Black with Candy Alamoana Red or Candy Aleutian Blue with Shasta White
  • The black bike had red panels outlined with orange stripes; but the blue bike had white panels outlined with red stripes
  • The wheels, engine, and “velocity stack” covers were solid black
  • The left side fork leg was solid black
  • The speedometer numbers were in increments of 10 (e.g., 15, 25, 35, 45, etc.)
  • The engine was a 696cc DOHC 4-valve inline four linked to a 6-speed transmission and driving a shaft to the rear wheels
  • The serial number began JH2RC200*GM200001

700 (CB700SC) Image Gallery