Built around Honda's custom - cruiser motorcycle platform, the 1983 Honda CB 750 SC Nighthawk pairs a 749 cc (45.7 cu in) air-cooled in-line four, four-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 70 HP (51.1 kW) at 7,200 rpm, transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 93.5 HP per liter, the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.
On the scales, the CB 750 SC Nighthawk measures 259.9 kg (573 lbs) wet (curb), translating to a power-to-weight ratio of 0.27 HP/kg (3.71 kg per horsepower). Rider ergonomics and chassis geometry center around a 1,544 mm (60.8 in) wheelbase engineered for planted straight-line stability.
Specific Output
93.5 HP/L
Power-to-Weight
0.27 HP/kg (3.71 kg/HP)
Engine
Displacement749.0 ccm (45.70 cubic inches)
Engine TypeIn-line four, four-stroke
Engine DetailsIn-line four, four-stroke
Power70.0 HP (51.1 kW)) @ 7200 RPM
Compression9.0:1
Bore x Stroke61.0 x 61.0 mm (2.4 x 2.4 inches)
Valves/Cylinder4
Fuel SystemCarburettor. 4 keihin 30 mm
Fuel ControlDouble Overhead Cams/Twin Cam (DOHC)
Lubricationwet sump
CoolingAir
Max RPM9500
Transmission
Gearbox5-speed
Final DriveChain (final drive)
Clutchwet plate
Performance
Top Speed210.8 km/h (131.0 mph)
Exhaustfour into four
Chassis
Frame Typedual downtube, full cradle, mild steel
Rake29.5°
Trail119 mm (4.7 inches)
Front Suspensionleading axle coil,air spring fork,anti dive yielding
Rear Travel155 mm (6.1 inches)
Wheelbase1544 mm (60.8 inches)
Ground Clearance163 mm (6.4 inches)
Wheels & Brakes
Front BrakesDouble disc. 2 piston calipers
Rear BrakesExpanding brake (drum brake). rod actuated drum
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Power
Compare engine output with similar motorcycles if acceleration, highway use or two-up riding matters.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
