| Year | 1980 |
| Bore x Stroke | 85 x 70 mm |
| Capacity | 397 cc / 24.2 cu-in |
| Clutch | Wet, multiplate |
| Compression Ratio | 7.3:1 |
| Cooling System | Air cooled |
| Engine | Two stroke, single cylinder, piston and reed valve |
| Final Drive | Chain |
| Frame | Single-downtube, full-cradle, chromemoly frame, aluminum box- section swingarm |
| Front Brakes | Drum |
| Front Suspension | 36mm Air asissted telescopic forks |
| Front Tyre | 3.00-21 |
| Front Wheel Travel | 250 mm / 9.8 in |
| Fuel Capacity | 10.6 Litres / 2.8 US gal |
| Ground Clearance | 305 mm / 12.0 in |
| Ignition | Capacitor-discharge, external-rotor magneto |
| Induction | Mikuni VM36SS carburetor |
| Lubrication System | Fuel/oil premix, 20:1 |
| Max Power | 27.7 kW / 37.69 hp @ 7000 rpm |
| Max Torque | 40 Nm / 29.47 lb-ft @ 6000 rpm |
| Rake | 29° |
| Rear Brakes | Drum |
| Rear Suspension | KYB dual shocks with adjustable pre-load |
| Rear Tyre | 5.10-18 |
| Rear Wheel Travel | 246 mm / 9.6 in |
| Seat Height | 946 mm / 37.2 in |
| Starting | Kick |
| Trail | 125 mm / 4.9 in |
| Transmission | 5 Speed |
| Wet Weight | 122 kg / 268 lbs |
| Wheelbase | 1461 mm / 57.5 in |
