| Year | 1981 |
| Battery | 6V, 4Ah |
| Bore x Stroke | 88 x 82 mm |
| Capacity | 498 cc / 30.4 cu in |
| Clutch | Wet, multi-plate |
| Compression Ratio | 8.7:1 |
| Cooling System | Air/oil cooled |
| Dry Weight | 139 kg / 306 lbs |
| Engine | Four stroke, single cylinder, SOHC, 4 valves |
| Final Drive | Chain, #520 |
| Final Reduction | 3.36:1 |
| Front Wheel Travel | 195 mm / 7.7 in |
| Front Brakes | 150 mm Drum |
| Front Suspension | Telescopic fork, Showa 36 mm, air/oil damped |
| Front Tyre | 3.00 -21 |
| Fuel Reserve | 2 Litres / 0.5 US gal / 0.4 Imp gal |
| Fuel Capacity | 9 Litres / 2.4 US gal / 2.0 Imp gal |
| Ground Clearance | 270 mm / 10.6 in |
| Ignition | PEI pointless |
| Induction | Mikuni BS40SS carburetor |
| Lubricaiton System | Wet sump |
| Max Power | 26 kW / 36 hp @ 6500 rpm |
| Max Torque | 42 Nm / 4.3 kgf-m /31 lb-ft @ 5000 rpm |
| Primary Reduction | 2.39:1 |
| Rake | 29.5 |
| Rear Brakes | 150 mm Drum |
| Rear Suspension | Swingarm, dual shocks, coil springs, adjustable springload and compression damping |
| Rear Tyre | 4.60 -18 |
| Rear Wheel Travel | 195 mm / 7.7 in |
| Review | Clement Salvadori, Rider Magazine |
| Seat Height | 870 mm / 34.3 in |
| Starting | Kick |
| Transmission | 5 Speed, constant mesh |
| Wheelbase | 1461 mm / 57.5 in |
