| Year | 1981 |
| Bore x Stroke | 51 х 48.8 mm |
| Capacity | 398 cc / 24.2 cu-in |
| Compression Ratio | 9.7:1 |
| Cooling System | Air cooled |
| Dry Weight | 176 kg / 388 lbs |
| Engine | Four stroke, transverse four cylinder. DOHC |
| Final Drive | Chain |
| Front Brakes | Single discs 2 piston caliper |
| Front Suspension | 35mm Telescopic forks |
| Front Tyre | 3.00-19 |
| Front Wheel Travel | 142 mm / 5.6 in |
| Fuel Capacity | 15 Litres / 3.9 US gal |
| Ignition | Battery powered inductive |
| Induction | 2x 34mm Mikuni carburetor |
| Max Power | 45 hp / 32.8 kW @ 10000 rpm |
| Max Torque | 3.5 kgf-m / 25 lb-ft@ 8000 rpm |
| Rear Brakes | Drum |
| Rear Suspension | Single shock, adjustable spring preload |
| Rear Tyre | 110 90-18 |
| Rear Wheel Travel | 96 mm / 3.8 in |
| Starting | Electric |
| Transmission | 6 Speed |
