| Year | 1981 |
| Bore x Stroke | 62 x 55.8 mm |
| Capacity | 673 cc / 41 cu in |
| Compression Ratio | 9.4:1 |
| Cooling System | Air cooled |
| Dry-weight | 213 kg / 470 lbs |
| Engine | Four stroke, transverse four cylinders, DOHC, 2 valves per cylinder. |
| Final Drive | Shaft |
| Front Wheel Travel | 150 mm / 5.9 in |
| Front Brakes | 2 x 275 mm discs, 2 piston calipers |
| Front Suspension | Telescopic fork |
| Front Tyre | 3.25-H19 |
| Fuel Capacity | 16 Litres / 4.2 US gal / 3.5 Imp mpg |
| Ignition | Transistorized |
| Induction | 4 x 32mm Mikuni carburetors |
| Max Power | 53.2 kW / 73 hp @ 9400 rpm |
| Max Torque | 57 Nm / 5.8 kgf-m / 42 lb-ft @ 8000 rpm |
| Rear Wheel Travel | 100 mm / 3.9 in |
| Rear Brakes | Single 275mm disc, 1 piston caliper |
| Rear Suspension | Pivoted rear shocks 5-way preload adjustment. |
| Rear Tyre | 4.25-H 17 |
| Standing ¼ Mile | 13.3 sec / 162 km/h / 100.5 mph |
| Starting | Electric |
| Top Speed | 196 km/h / 122 mph |
| Transmission | 5 Speed |
