| Year | 1987 |
| Bore x Stroke | 70 х 51.8 mm |
| Capacity | 398 cc / 24.3 cu-in |
| Clutch | Wet, multiple discs, cable operated |
| Compression Ratio | 10.7:1 |
| Cooling System | Liquid cooled |
| Dry Weight | 177 kg / 390 lbs |
| Engine | Four stroke, parallel twin cylinders, DOHC, 4 valves per cylinder. |
| Final Drive | Chain |
| Frame | Iron, Double cradle frame |
| Front Brakes | 2x discs |
| Front Suspension | 38mm Telescopic forks |
| Front Tyre | 110/70-17 |
| Front Wheel Travel | 130 mm / 5.1 in |
| Fuel Capacity | 16 Litres / 3.9 US gal |
| Ignition | TCI (Transistor Controlled Ignition) |
| Induction | Carburetor |
| Lubrication | Wet sump |
| Max Power | 50 hp / 36.5 kW @ 10500 rpm |
| Max Torque | 3.6 kgf-m @ 9000 rpm |
| Rear Brakes | Single disc |
| Rear Suspension | Swinging arm, single shock adjustable for spring preload |
| Rear Tyre | 130/70-17 |
| Rear Wheel Travel | 100 mm / 3.9 in |
| Starting | Electric |
| Transmission | 6 Speed |
