| 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 | 212 kg / 467 lbs |
| Engine | Four stroke, transverse four cylinders, DOHC, 2 valves per cylinder. |
| Final Drive | Chain |
| Front Brakes | 2 x 275 mm discs, 2 piston calipers |
| Front Suspension | Air asssited telescopic fork |
| Front Tyre | 90/90-19 |
| Fuel Capacity | 12 Litres / 3.2 US gal / 2.6 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 Brakes | Single 275mm disc, 1 piston caliper |
| Rear Suspension | Dual shocks, 5-way preload and 4-way damping |
| Rear Tyre | 130/90-16 |
| Starting | Electric |
| Transmission | 5 Speed |
