| Year | 1981 |
| Battery | 12V 14Ah |
| Bore x Stroke | 56 x 55.8 mm |
| Capacity | 549 cc / 33.5 cu in |
| Clutch | Multiplate, wet |
| Compression Ratio | 8.6:1 |
| Consumption Average | 5.7 L/100 km / 17.4 km/l / 41 US mpg / 49.2 Imp mpg |
| Cooling System | Air cooled |
| Dimensions | Length 2100 mm / 82.7 in Width 720 mm / 28.3 in |
| Engine | Four stroke, transverse four cylinders, DOHC, 2 valve per cylinder. |
| Final Drive | Chain, Daido D.I.D 530 'O' Ring, approx. 100 links |
| Final Reduction | 3.400:1 (51/15 - UK) / 3.267:1 (49/15 - US) / 3.333:1 (50/15 - Italy) |
| Front Wheel Travel | 145 mm / 5.7 in |
| Front Brakes | 2 x 275mm discs, 1 piston calipers |
| Front Suspension | 35 mm Air assisted forks, 2-way spring preload adjustable |
| Front Tyre | 3.25-19 |
| Fuel Capacity | 22 Litres / 5.8 US gal / 4.8 Imp gal |
| Gear Ratio | 1st 2.666 / 2nd 1.777 / 3th 1.380 / 4th 1.173 / 5th 1.045 / 5th 0.956:1 |
| Ground Clearance | 160 mm / 6.3 in |
| Ignition | Transistorized |
| Ignition Timing | 15º BTDC below 1500 rpm / 40º BTDC above 2350 rpm |
| Induction | 4 x 34mm Mikuni carburetors |
| Lubrication | Wet sump |
| Max Power | 40 kW / 53.7 hp @ 9400 rpm |
| Max Torque | 41 Nm / 4.4 kgf-m / 32lb-ft @ 8200 rpm |
| Primary Reduction | 1.977:1 (87/44) |
| Rear Wheel Travel | 85 mm / 2.2 in |
| Rear Brakes | Single drum |
| Rear Suspension | Dual shocks, adjustable spring preload and rebound damping |
| Rear Tyre | 3.75-18 |
| Reserve | 4.0 Litres / 1.1 US gal / 0.88 Imp gal |
| Seat Height | 740 mm / 29.1 in |
| Spark Plug | B8ES NGK, N60R for real performance |
| Starting | Electric |
| Top Speed | 167 km/h / 104 mph |
| Transmission | 6 Speed |
| Wet Weight | 215 kg / 452 lbs |
| Wheelbase | 1435 mm / 56.5 in |
