| Year | 1989 |
| Battery | 12V 16Ah |
| Bore x Stroke | 70.5 x 51 mm |
| Capacity | 398 cc / 24.3 cu in |
| Compression Ratio | 10.0:1 |
| Cooling System | Air cooled |
| Dimensions | Length: 2000 mm / 78.7 in Width: 670 mm / 26.4 in Height: 1160 mm / 45.7 in |
| Dry Weight | 174 kg / 384 lbs |
| Engine | Four stroke, 90°“L”twin cylinder, SOHC, desmodromic 2 valve per cylinder. |
| Final Drive | Chain |
| Final Drive Ratio | 3.142:1 (14/44) |
| Front Brakes | 2 x 280 mm Discs |
| Front Suspension | 41mm Marzocchi inverted telescopic fork, M1BB |
| Front Tyre | 130/60 VR16 |
| Fuel Capacity | 17 L / 4.5 US gal / 3.7 Imp gal |
| Gear Ratios | 1 st 3.071 / 2nd 2.111 ./ 3rd 1.590 / 4th 1.280 / 5th 1.074 / 6th 0.931:1 |
| Ignition | Kokusan electronic |
| Induction | Mikuni CVK-V36 carburetor |
| Max Torque | 35.2 Nm / 3.6 kgf-m / 26 ft-lb @ 8500 rpm |
| Max Power | 30.9 kW / 42 hp @ 10000 rpm |
| Primary Drive Ratio | 2.264:1 (34/77) |
| Rear Brakes | Single 260 mm disc |
| Rear Suspension | Cantilever swingarm, Marzocchi PBS1R monoshock, preload and rebound damping |
| Rear Tyre | 160/60 VR16 |
| Seat Height | 750 mm / 29.5 in |
| Spark Plugs | NGK BP7HS |
| Starting | Electric |
| Transmission | 6 Speed |
| Wheelbase | 1450 mm / 57.1 in |
