| Year | 1959 |
| Bore x Stroke | 63 x 80 mm |
| Capacity | 490 cc / 29.9 cub in. |
| Clutch | Wet,6 plate |
| Compression Ratio | 7.2:1 |
| Cooling System | Air cooled |
| Dry Weight | 155 kg / 341 lbs |
| Engine | Four stroke, parallel twin, OHV |
| Final Drive | Chain |
| Frame | Singe tube frame |
| Front Brakes | Drum, 7 in SLS |
| Front Suspension | Hydraulic telescopic fork |
| Front Tyre | 3.25 - 19, Dunlop Universal |
| Fuel Capacity | 18 L / 4.8 US gal / 4.0 Imp gal |
| Ground Clearance | 152 mm / 6.0 in |
| Ignition | 6 V magnetic flywheel |
| Induction | Single Amal carburetor 15/16" |
| Max Power | 20.1 kW / 27 hp @ 6500 rpm |
| Rear Brakes | Drum, 7 in SLS |
| Rear Suspension | 1947-1954 sprung hub, after 1954 Swingarm with two shock absorbers |
| Rear Tyre | 3.50 - 19, Dunlop Universal |
| Saddle Height | 749 mm / 29.5 in |
| Starting | Kick |
| Transmission | 4 Speed, constant mesh |
| Wheelbase | 1372 mm / 54 in |
