| Year | 1986 |
| Battery | Yuasa 12V 14Ah |
| Bore x Stroke | 82 x 61.5 mm |
| Capacity | 649cc / 39.6 cu in |
| Clutch | Dry, multiplate |
| Compression Ratio | 10.0:1 |
| Cooling System | Air cooled |
| Dimensions | Length: 2024 mm / 79.7 in Width: 930 mm / 36.6 in Height: 1400 mm / 55.1 in |
| Dry Weight | 180 kg / 396.5 lbs |
| Engine | Four stroke, 90°“L”twin cylinder, SOHC, desmodromic 2 valves per cylinder, belt driven |
| Final Drive | Chain |
| Final Drive Ratio | 3.066:1 (15/46) |
| Front Brakes | Single 260 mm disc |
| Front Suspension | 40 mm Marzocchi PA 185/40 fork |
| Front Tyre | 110/90-18 |
| Fuel Capacity | 13 Litres / 3.4 US gal / 2.9 Imp gal |
| Gear Ratios | 1st 3.071 / 2nd 1.850 / 3rd 1.333 / 4th 1.074 / 5th0.931:1 |
| Ignition | Kokusan electronic |
| Induction | Bing 64-32/375 |
| Max Power | 40.0 kW / 53 hp @ 7000 rpm |
| Max Torque | 45 Nm / 4.6 kgf-m / 33.2 ft-lb @ 6000 rpm |
| Primary Drive Ratio | 1.972:1 (31/71) |
| Rear Brakes | Single 280 mm disc |
| Rear Suspension | Marzocchi A84 twin shocks |
| Rear Tyre | 140/90-15 |
| Seat Height | 760 mm / 29.9 in |
| Spark Plugs | Champion L82Y |
| Starting | Electric |
| Transmission | 5 Speed |
| Wheelbase | 1530 mm / 60.2 in |
