| Year | 1991 |
| Bore x Stroke | 95 x 90.4 mm |
| Braking 100 km/h - 0 | 41.8 m / 137.1 ft |
| Braking 60 km/h - 0 | 14 m / 45.9 ft |
| Capacity | 640 cc / 39 cu in |
| Compression Ratio | 9.7:1 |
| Consumption average | 5.5 L/100 km / 18.1 km/l / 42.5 US mpg / 51.1 Imp mpg |
| Dimensions | Length: 2385 mm / 93.9 in Width: 870 mm / 34.3 in Height: 1330 mm / 52.4 in |
| Dry Weight | 178 kg / 392 lbs |
| Engine | Air/oil cooled, four stroke, single cylinder. SOHC, 4 Valve per cylinder. |
| Final Drive | Chain |
| Front Brakes | Single 280mm disc, 2 piston caliper |
| Front Suspension | Telescopic fork |
| Front Tyre | 90/90-21 |
| Fuel Capacity | 21 Litres / 5.5 US gal / 4.6 Imp gal |
| Ignition | Digital |
| Induction | 40 mm Flat side BST40 Mikuni |
| Max Power | 32.8 kW / 45 hp @ 6800 rpm (at rear wheel 30.6 kW / 41.1hp @ 6500 rpm ) |
| Max Torque | 57 Nm / 5.1 kgf-m / 42.0 lb-ft @ 5000 rpm |
| Rear Brakes | Single 230mm disc, 2 piston calipers |
| Rear Suspension | Full Floater swingarm, single shock, gas/oil damped |
| Rear Tyre | 120/90-17 |
| Road Test | Motosprint Group Test 1990 |
| Seat Height | 890 mm / 34.8 in |
| Standing ¼ Mile | 15.1 sec / 144.7 km/h / 89.9 mph |
| Starting | Kick |
| Top Speed | 162.5 km/h / 101 mph |
| Transmission | 5 Speed |
| Wet Weight | 184 kg / 406 lbs |
| Wheelbase | 1510 mm / 59.5 in |
