| Year | 1988 |
| Bore x Stroke | 87 х 67.2 mm |
| Capacity | 399 cc / 24.3 cu-in |
| Clutch | Wet, Multiple Disc |
| Compression Ratio | 8.5:1 |
| Cooling System | Air cooled |
| Engine | Four stroke, single cylinder, SOHC, 2 valves per cylinder. |
| Final Drive | Chain |
| Frame | Steel Double Cradle |
| Front Brakes | Single disc |
| Front Suspension | 35mm Telescopic fork |
| Front Tyre | 3.50-18 |
| Front Wheel Travel | 150 mm / 5.9 in |
| Fuel Capacity | 14 Litres / 3.69 US gal |
| Ground Clearance | 130 mm / 5.1 in |
| Ignition | CDI |
| Induction | Vacuum Mikuni BST34/1 carburetor |
| Lubrication | Wet sump |
| Max Power | 22.93 hp / 16.7 KW @ 6500 rpm |
| Max Torque | 27.4 Nm / 20.2 lb-ft @ 3000 rpm |
| Oil Capacity | 2.4 Litres |
| Rake Caster Angle | 27° |
| Rear Brakes | Drum |
| Rear Suspension | Dual shocks, 5-way adjustable preload |
| Rear Tyre | 4.00-18 |
| Rear Wheel Travel | 105 mm / 4.1 in |
| Seat Height | 790 mm / 30.9 in |
| Starting | Kick |
| Trail | 111 mm / 4.4 in |
| Transmission | 5 Speed |
| Wet Weight | 174 kg / 384 lbs |
| Wheelbase | 1410 mm / 55.5 IN |
