Built around Honda's custom - cruiser motorcycle platform, the 1985 Honda CBX 650 E Nighthawk utilizes a 656 cc (40 cu in) oil & air-cooled in-line four, four-stroke layout. In factory specification, peak output is rated at 60 HP (43.8 kW) at 10,000 rpm, transferring power to the rear wheel through a 6-speed gearbox and shaft drive (cardan) final drive. With a specific output of 91.5 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 CBX 650 E Nighthawk measures 230 kg (507 lbs) wet (curb), translating to a power-to-weight ratio of 0.26 HP/kg (3.83 kg per horsepower). Rider ergonomics and chassis geometry center around a 780 mm (30.7 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,467 mm (57.8 in) wheelbase engineered for balanced agility and highway composure. The 11-liter (2.9 US gal) fuel tank paired with a rated consumption of 6 L/100 km provides an estimated theoretical range of roughly 183 km (114 miles) between fill-ups, while factory top speed is listed at 200 km/h (124 mph).
Specific Output
91.5 HP/L
Power-to-Weight
0.26 HP/kg (3.83 kg/HP)
Theoretical Range
~183 km (114 mi)
Engine
Displacement656.0 ccm (40.03 cubic inches)
Engine TypeIn-line four, four-stroke
Engine DetailsIn-line four, four-stroke
Power60.0 HP (43.8 kW)) @ 10000 RPM
Compression9.5:1
Bore x Stroke60.0 x 58.0 mm (2.4 x 2.3 inches)
Valves/Cylinder4
Fuel SystemCarburettor. Keihin 35 mm
Fuel ControlDouble Overhead Cams/Twin Cam (DOHC)
IgnitionMechanical
CoolingOil & air
Max RPM14000
Transmission
Gearbox6-speed
Final DriveShaft drive (cardan) (final drive)
ClutchWet plate
Performance
Top Speed200.0 km/h (124.3 mph)
Fuel Consumption6.00 litres/100 km (16.7 km/l or 39.20 mpg)
Greenhouse Gases139.2 CO2 g/km. (CO2 - Carbon dioxide emission)
ExhaustDouble aluminium pipes
Chassis
Frame TypeTubular steel cradle
Front SuspensionShowa air-spring, brake-actuated hydraulic anti-dive
Rear SuspensionAdjustable gas charge compresion shocks
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.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
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.
