| Year | 1985 |
| Battery | 12V, 12Ah |
| Bore x Stroke | 53 x 45.2 mm |
| Capacity | 398 cc / 24.3 cu in |
| Caster | 63° |
| Clutch | Wet, multiplate |
| Compression Ratio | 10.2:1 |
| Cooling System | Air cooled |
| Dimensions | Length: 2105 mm / 82.9 inWidth: 750 mm / 29.5 in Height: 1135 mm / 44.7 in |
| Dry Weight | 179 kg / 395 lbs |
| Engine | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder. |
| Final Drive | Chain, DAIDO DID50UB, 104 links |
| Final Reduction | 2.866 (43/15) |
| Front Wheel Travel | 150 mm / 5.9 in |
| Front Brakes | 2 x Discs |
| Front Suspension | Telescopic fork, oil dampened |
| Front Tyre | 3.25-S19 4PR |
| Fuel Reserve | 3.5 Litres / 3.7 US qt / 3.1 Imp qt |
| Fuel Capacity | 15 Litres / 4.0 US gal / 3.3 Imp gal |
| Gear Ratios | 1st 3.166 (38/12) / 2nd 2.125 (34/16) / 3rd 1.631 (31/19) / 4th 1.333 (28/21) / 5th 1.173 (27/23) / 6th 1.083 (26/24) |
| Ground Clearance | 165 mm / 6.5 in |
| Ignition | Fully transistorised |
| Induction | 4 x Mikuni BS26SS carburetors |
| Lubrication System | Wet sump |
| Max Power | 30.8 kW / 41.3 hp @ 10500 rpm |
| Max Torque | 30.2 Nm / 3.1 kgf-m / 22.3 lb-ft @ 8500 rpm |
| Oil Capacity | 2.0 Litres / 2.1 US qt / 1.8 Imp qt |
| Primary Reduction | 2.300 (92/40) |
| Rear Wheel Travel | 107 mm / 4.2 in |
| Rear Brakes | Single disc |
| Rear Suspension | Swingarm, dual shocks, oil dampened, spring 5-way adjustable |
| Rear Tyre | 3.75-S18 4PR |
| Seat Height | 780 mm / 30.7 in |
| Spark Plug | NGK D8EA, NIPPON DENSO X24ES-U |
| Standing 0 - 100 km/h | 6.3 sec |
| Starting | Electric |
| Steering Angle | 42° (left and right) |
| Top Speed | 170 km/h / 106 mph |
| Trail | 100 mm / 3.9 in |
| Transmission | 6 Speed |
| Turning Radius | 2.3 m / 7.5 ft |
| Wet Weight | 197 kg / 434 lbs |
| Wheelbase | 1415 mm / 55.7 in |
