| Year | 1978 |
| Bore x Stroke | 67 x 60 mm |
| Capacity | 423 cc / 25.8 cu in |
| Clutch | Wet multiplafe |
| Compression Ratio | 9.1:1 |
| Cooling System | Air cooled |
| Dry Weight | 173 kg / 382 lbs |
| Engine | Four stroke, parallel twin cylinder, DOHC, 2 valves per cylinder. |
| Final Drive | Chain |
| Front Brakes | Single disc, 11in |
| Front Suspension | Telescopic fork |
| Front Tyre | 3.00-18 |
| Fuel Capacity | 15 Litres / 4.0 US gal / 3.3 Imp gal |
| Induction | 2 x 34 mm Mikuni carburetors |
| Max Power | 29.8 kW / 40 hp @ 7000 rpm |
| Rear Brakes | Drum, 7 in |
| Rear Suspension | Twin shocks, coil spring over |
| Rear Tyre | 3.75-18 |
| Seat Height | 787 mm / 31 in |
| Starting | Electric and kick |
| Transmission | 6 Speed |
