| Year | 1985 |
| Bore x Stroke | 55 x 42 mm |
| Capacity | 399 cc / 24.3 cu-in |
| Clutch | Wet multi-plate coil spring |
| Compression Ratio | 9.6:1 |
| Cooling System | Air cooled |
| Dry Weight | 174 kg / 383.6 lbs |
| Engine | Four stroke, transverse four cylinder, DOHC, 4 valve per cylinder. |
| Final Drive | Chain |
| Front Brakes | 2x discs |
| Front Suspension | Telescopic forks |
| Front Tyre | 100/90 -16 |
| Fuel Capacity | 18 Litres / 4.7 US gal |
| Gear Ratio | 1st 2.769 2nd 1.850 1.850 3rd 1.478 1.478 4th 1.240 1.240 5th 1.074 1.074 6th 0.965 0.965 |
| Ignition | CDI |
| Induction | VE53 carburetor |
| Max Power | 58 hp / 43.2 kW @ 12300 rpm |
| Max Torque | 3.6 kgf-m / 26.0 lb-ft @ 11000 rpm |
| Rear Brakes | Single disc |
| Rear Suspension | Swinging arm |
| Rear Tyre | 100/90 -18 |
| Seat Height | 790 mm / 31.1 in |
| Starting | Electric |
| Transmission | 6 Speed |
