| Year | 1988 |
| Bore x Stroke | 57 x 39 mm |
| Capacity | 399 cc / 24.3 cu-in |
| Clutch | Wet multi disc |
| Compression Ratio | 11.5:1 |
| Cooling System | Liquid cooled |
| Dry Weight | 176 kg / 388 lbs |
| Engine | Four stroke, transverse four cylinder, DOHC, 4 Valve per cylinder. |
| Final Drive | Chain |
| Frame | Aluminum diamond tubular, double cradle |
| Front Brakes | 2x 300mm discs 4 piston calipers |
| Front Suspension | 41mm Telescopic forks |
| Front Tyre | 100/90-16 |
| Fuel Capacity | 16 Litres / 4.2 US gal |
| Gear Ratio | 1st 2,571 2nd 1,777 3rd 1,38 4th 1,125 5th 0,961 6th 0,851 |
| Ignition | CDI |
| Induction | 4x Keihin CVKD30 carburetors |
| Max Power | 59 hp / 44 kW @ 12000 rpm |
| Max Torque | 3.6 kgf-m / 26.0 lb-ft @ 10500 rpm |
| Rake | 24° |
| Rear Brakes | Single 240mm disc 1 piston caliper |
| Rear Suspension | Rising rate monoshock |
| Rear Tyre | 130/90-16 |
| Seat Height | 770 mm / 30.3 in |
| Secondary Reduction Ratio | 2.933 (44/15) |
| Starting | Electric |
| Total Reduction Ratio | (6-speed) 7.154 |
| Trail | 87mm / 3.4 in |
| Transmission | 6 Speed |
| Wheelbase | 1395 mm / 54.9 in |
