| Year | 1978 |
| Bore x Stroke | 65 x 60 mm |
| Capacity | 398 cc / 24.2 cu-in |
| Clutch | Wet multi-plate type |
| Compression Ratio | 9:1 |
| Cooling System | Air cooled |
| Dimensions | Length 2085 mm / 82.1 in Width 835 mm / 32.9 in Height 1125 mm / 44.3 in |
| Dry Weight | 172 kg / 378 lbs |
| Engine | Four stroke, parallel twin cylinders, DOHC, 2 valve per cylinder. |
| Final Drive | Chain |
| Final Drive Ratio | 2.461 |
| Frame | Double cradle tube |
| Front Brakes | Single 270 mm disc, 1 piston caliper |
| Front Suspension | Telescopic, coil spring, oil damped |
| Front Tyre | 3.00-18 |
| Fuel Capacity | 14 Litres / 3.7 US gal / 3.1 Imp gal |
| Gear Ratio | 1st 2.461 / 2nd 1.777 / 3rd 1.380 / 4th 1.125 / 5th 0.961 / 6th 0.851:1 |
| Ground Clearance | 170 mm / 6.7 in |
| Ignition | Conventional type non-transistor |
| Induction | 2 x Mikuni BS34 carburetors |
| Max Power | 25.4 kW / 34 hp / @ 8000 rpm |
| Max Torque | 30 Nm / 2.94 kpm / 22.1 lb-ft @ 7000 rpm |
| Primary Drive Ratio | 2.714 |
| Rear Brakes | 160mm Drum |
| Rear Suspension | Swing arm, coil spring (5-way adjustable), oil damped |
| Rear Tyre | 3.50-18 |
| Seat Height | 790 mm / 31.1 in |
| Starting | Electric and kick-start. |
| Transmission | 6 Speed |
| Wet Weight | 185.0 kg / 408 lbs |
| Wheelbase | 1385 mm / 54.5 in |
