| Year | 1982 |
| Bore x Stroke | 69.0 x 53.4 mm |
| Capacity | 399 cc / 24.3 cu-in |
| Clutch | Wet, multiplate |
| Compression Ratio | 9.7:1 |
| Cooling System | Air cooled |
| Dry Weight | kg / 366 lbs |
| Engine | Four stroke, parallel twin, DOHC, 2 valves per cylinder |
| Final Drive | Chain |
| Frame | Pressed steel spine with engine as stressed member |
| Front Brakes | Single 10.5 in disc |
| Front Suspension | Hydraulic telescopic forks |
| Front Tyre | 3.00S19-4PR |
| Front Wheel Travel | 138 mm / 5.5 in |
| Fuel Capacity | 14 Litres / 3.7 US gal |
| Ground Clearance | 5.9 in |
| Ignition | Transistorized |
| Induction | 2x 32mm Mikuni carburetors |
| Lubrication | Wet sump |
| Max Power | 45.5 hp / 34 kW @ 9500 rpm |
| Max Torque | 3.5 kgf-m / 25.3 lb-ft @ 8000 rpm |
| Rake | 63° |
| Rear Brakes | Drum |
| Rear Suspension | Monocross system with single coil sprung, gas/oil damped shock, pre-load adjustable |
| Rear Tyre | 13/90-16 |
| Rear Wheel Travel | 96.5 mm / 3.8 in |
| Seat Height | 30.9 in |
| Starting | Electric |
| Trail | 95 mm / 3.74 in |
| Transmission | 6 Speed |
| Wheelbase | 54.1 in |
