| Year | 1986 |
| Battery | Yuasa 12V 14Ah |
| Bore x Stroke | 70.5 x 51mm |
| Capacity | 398 cc / 24.3 cu in |
| Clutch | Wet multiplate |
| Compression Ratio | 10.4:1 |
| Cooling System | Air cooled |
| Dimensions | Length: 2050 mm / 80.7 in Width: 670 mm / 26.4 in Height: 900 mm / 35.4 in |
| Dry Weight | 180 kg / 397 lbs |
| Engine | Four stroke, 90°“L” twin cylinder, Desmo SOHC, belt-driven |
| Final Drive | Chain |
| Front Brakes | 2 x 260mm discs |
| Front Suspension | 35 mm Marzocchi fork |
| Front Tyre | 100/90-18 |
| Fuel Capacity | 1986: 22L / 5.8 US gal / 4.8 Imp gal 1987 - 88: 18 L / 4.8 US gal / 4.0 Imp gal |
| Gear Ratios | 1986-87: 1st 2.500 / 2nd 1.714 / 3rd 1.333 / 4th 1.074 / 5th 0.931:1 |
| Ignition | Electronic ignition, Bosch BTZ |
| Induction | Dell'Orto PHF30M carburetor (1988: PHF36) |
| Max Power | 34.6 kW / 47 hp @ 10000 rpm |
| Max Torque | 26.5 Nm / 2.7 kgf-m / 19.5 ft-lb @ 7500 rpm |
| Primary Drive | 2.226:1 (31/69) |
| Rear Brakes | Single 260 mm disc |
| Rear Suspension | Single adjustable shock, Boge |
| Rear Tyre | 120/80-18 |
| Seat Height | 750 mm / 29.5 in |
| Spark Plug | Champion L82YC |
| Starting | Electric |
| Top Speed | 175 km/h / 108.7 mph |
| Transmission | 5-speed (1988:) 6 Speed |
| Wheelbase | 1400 mm / 55.1 in |
