| Year | 1981 |
| Bore x Stroke | 62 x 55.8 mm |
| Capacity | 673 cc / 41 cu in |
| Clutch | Wet multi-plate |
| Compression Ratio | 9.5:1 |
| Cooling System | Air cooled |
| Engine | Four stroke, transverse four cylinders, DOHC, 2 valves per cylinder |
| Final Drive | Shaft |
| Frame | Full-cradle tubular steel, twin down tube |
| Front Wheel Travel | 150 mm / 5.9 in |
| Front Brakes | 2 x 275 mm discs, 2 piston calipers |
| Front Suspension | Telescopic fork |
| Front Tyre | 3.25-H19 |
| Fuel Capacity | 16 Litres / 4.2 US gal |
| Ignition | Transistorized |
| Induction | 4 x 32mm Mikuni carburetors |
| Max Power | 53.2 kW / 73 hp @ 9400 rpm |
| Max Torque | 57 Nm / 5.8 kgf-m / 42 lb-ft @ 8000 rpm |
| Rake | 27.75° |
| Rear Wheel Travel | 100 mm / 3.9 in |
| Rear Brakes | Single 275mm disc, 1 piston caliper |
| Rear Suspension | Dual pivoted rear shocks 5-way preload adjustment |
| Rear Tyre | 4.25-H17 |
| Seat Height | 780 mm / 30.7 in |
| Starting | Electric |
| Trail | 113 mm / 4.45 in |
| Transmission | 5 Speed |
| Wet Weight | 228.1 kg / 503 lbs |
| Wheelbase | 1440 mm / 56.7 in |
