| MODEL | HONDA CB 650SC NIGHTHAWK 1982 - 1985 |
| Year | 1982 - 1985 |
| Engine Type | Four stroke, transverse four cylinder, DOHC |
| Displacement / Capacity | 652 cc |
| Bore X Stroke | 60 x 58 mm |
| Compression Ratio | 9.5:1 |
| Cooling System | Air/oil cooled |
| Max Power | 46.3 kW / 63 hp @ 10000 rpm |
| Max Torque | — |
| Ignition | Transistorised |
| Induction | 4 x 26 mm Keihin carburettors |
| Start System | Electric |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 6 Speed |
| Clutch | Wet multi-plate |
| Final Drive | Shaft |
| CHASSIS SPECS | |
| Frame | Tubular steel full cradle |
| Front Suspension | Showa 39 mm air-assisted fork with brake-actuated hydraulic anti-dive |
| Rear Suspension | Dual Showa shocks, 5-way spring preload, 4-way rebound damping |
| Front Brakes | 2 x 275 mm discs, 2-piston calipers |
| Rear Brakes | 180 mm drum |
| DIMENSION SPECS | |
| Overall Length | 2210 mm / 87.0 in |
| Overall Width | 780 mm / 30.7 in |
| Overall Height | 1171 mm / 46.1 in |
| Seat Height | 780 mm / 30.7 in |
| Wheelbase | 1509 mm / 59.4 in |
| Ground Clearance | 145 mm / 5.7 in |
| Dry Weight | — |
| Wet Weight | 219 kg / 483 lbs |
| WHEEL SPECS | |
| Front Tyre | 100/90-19 |
| Rear Tyre | 130/90-16 |
| FUEL SYSTEM | |
| Fuel Capacity | 13.6 Litres / 3.6 US gal |
| Fuel Consumption | 50.4 mpg (US) |
| Top Speed | — |
Photo: Fx6893 at English Wikipedia, Public domain, via Wikimedia Commons
Photo: Andreas Koll, CC BY-SA 4.0, via Wikimedia Commons
Honda's Nighthawk 650 was the US standard that took over from the CB650 Custom. The 1982 bike kept the SOHC chain-drive engine, but for 1983 it gained an all-new rubber-mounted DOHC four with hydraulic valve adjusters, six speeds and shaft drive, plus an air fork with anti-dive - a low-maintenance commuter-tourer formula that ran to 1985.
