| Year | 1990 |
| Battery | 12v (6AH) YTX7A-BS |
| Bore x Stroke | 55 x 42 mm |
| Capacity | 399 cc / 24.3 cu-in |
| Charging | Triple phase output alternator |
| Clutch | Multi-plate, wet |
| Compression Ratio | 11.3:1 |
| Cooling System | Liquid cooled; radiator with cooling fan |
| Dimensions | Length 1990mm / 78.3 in width 670mm / 26.4 in Height 1080 mm / 42.5 in |
| Dry Weight | 163 kg / 359.4 lbs |
| Engine | Four stroke, transverse four cylinder, DOHC, 4 valve per cylinder. |
| Final Drive | Chain |
| Font Wheel | 17x3.5 in. |
| Frame | Twin-spar, box-section aluminum |
| Front Brakes | 2x 275mm discs 4 piston calipers |
| Front Suspension | 41mm Showa damper-rod forks with adjustable pre-load |
| Front Tyre | 120/60-17 |
| Fuel Capacity | 15 Litres / 4.0 gal |
| Gear Ratio | 1st 3.307 : 1 (43/13) 2nd 2.352 : 1 (40/17) 3rd 1.875 (30/16) 4th 1.591 (35/22)3 5th 1.435 (33/23) 6th 1.318 (29/22) |
| Ground Clearance | 125 mm / 4.9 in |
| Ignition | Digitalized full transistor ignition |
| Induction | 4x 26mm Flat-side CV |
| Lubrication | Forced pressure and wet sump |
| Max Power | 59 hp / 42.2 kW @ 12500 rpm |
| Max Torque | 39 Nm / 28.8 ft-lb @ 10000 rpm |
| Oil Capacity | 3.8 Liters |
| Oil Pump Type | Trockoid |
| Primary Drive | 2.117 |
| Rake | 24.3° |
| Rear Brakes | Single 220mm disc 2 piston caliper |
| Rear Suspension | Showa gas/oil shock with adjustable preload and compression |
| Rear Tyre | 150/60-18 |
| Rear Wheel | 17x4.5 in. |
| Seat Height | 750 mm / 29.5 in |
| Spark Plug | NGK CR9EH-9 or ND U27FER-9 |
| Starting | Electric |
| Trail | 91 mm / 3.6 in |
| Transmission | 6 Speed |
| Valve | Intake valve closes @ 1mm lift / Exhaust valve opens @ 1mm lift |
| Wheelbase | 1375mm / 54.1 in |
