| Year | 1981 |
| Bore x Stroke | 75 x 74 mm |
| Capacity | 653 cc / 39.8 cu in |
| Compression Ratio | 8.5:1 |
| Cooling System | Air cooled |
| Dimensions | Length: 2130 mm / 83.9"Width: 930 mm / 36.6"Height: 1225 mm / 48.2" |
| Dry Weight | 210 kg / 463 lbs |
| Engine | Four stroke, parallel twin cylinder, SOHC, 2 valves per cylinder. |
| Final Drive | Chain |
| Front Brakes | Twin hydraulic discs, 267 mm |
| Front Suspension | Telescopic forks |
| Front Tyre | 3.50S-19 |
| Fuel Capacity | 11.5 Litres / 3.0 US gal |
| Ground Clearance | 135 mm / 5.3" |
| Ignition | Battery, induction coil |
| Induction | 2 x Mikuni BS34SU carburetors |
| Lubrication | Wet sump |
| Max Power | 39.5 kW / 53 hp @ 7200 rpm |
| Max Torque | 54 Nm / 5.5 kgf-m / 39.8 lb-ft @ 5500 rpm |
| Oil Capacity | 2.5 Litres / 2.6 US qts |
| Rear Brakes | Single hydraulic disc, 267 mm |
| Rear Suspension | Dual shock absorbers |
| Rear Tyre | 130/90S-16 |
| Seat Height | 785 mm / 30.9" |
| Starting | Electric and kick |
| Transmission | 5 Speed |
| Wheelbase | 1435 mm / 56.5" |
