| MODEL | SUZUKI GS 650GT 1981 |
| Year | 1981 |
| Engine Type | Four stroke, transverse four cylinders, DOHC, 2 valves per cylinder |
| Displacement / Capacity | 673 cc / 41 cu in |
| Bore X Stroke | 62 x 55.8 mm |
| Compression Ratio | 9.4:1 |
| Cooling System | Air cooled |
| Max Power | 53.2 kW / 73 hp @ 9400 rpm |
| Max Torque | 57 Nm / 5.8 kgf-m / 42 lb-ft @ 8000 rpm |
| Ignition | Transistorized |
| Induction | 4 x 32 mm Mikuni carburettors |
| Start System | Electric |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 5 speed |
| Clutch | — |
| Final Drive | Shaft |
| CHASSIS SPECS | |
| Frame | Duplex cradle |
| Front Suspension | Telescopic fork; 150 mm / 5.9 in travel |
| Rear Suspension | Pivoted rear shocks, 5-way preload adjustment; 100 mm / 3.9 in travel |
| Front Brakes | 2 x 275 mm discs, 2 piston calipers |
| Rear Brakes | Single 275 mm disc, 1 piston caliper |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | — |
| Wheelbase | — |
| Ground Clearance | — |
| Dry Weight | 213 kg / 470 lb |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | 3.25 H19 |
| Rear Tyre | 4.25 H17 |
| FUEL SYSTEM | |
| Fuel Capacity | 16 Litres / 4.2 US gal |
| Fuel Consumption | — |
| Top Speed | 196 km/h / 122 mph |
The GS 650GT was the shaft-drive touring-oriented version of the 650 four, using the duplex cradle frame, twin front discs and a 16-litre tank. It aimed at comfortable long-distance riding with low maintenance, and could still reach about 196 km/h.
