| MODEL | HERCULES 317 1955 |
| Year | 1955 |
| Engine Type | Single cylinder, two-stroke |
| Displacement / Capacity | 197 cc / 12.02 cu in |
| Bore X Stroke | 62 x 66 mm / 2.4 x 2.6 in |
| Compression Ratio | — |
| Cooling System | Air |
| Max Power | 8 kW / 11 hp @ 5000 rpm |
| Max Torque | — |
| Ignition | — |
| Induction | Bing 26 mm carburettor |
| Start System | — |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | — |
| Clutch | — |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | Single cradle |
| Front Suspension | Telescopic |
| Rear Suspension | — |
| Front Brakes | Drum (expanding) |
| Rear Brakes | Drum (expanding) |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | — |
| Wheelbase | — |
| Ground Clearance | — |
| Dry Weight | 120 kg / 264.6 lb |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | 3-19 |
| Rear Tyre | 3-19 |
| FUEL SYSTEM | |
| Fuel Capacity | — |
| Fuel Consumption | — |
| Top Speed | 95 km/h / 59.0 mph |
A 197 cc two-stroke single with a single-cradle frame and telescopic forks. It sat between the smaller 174 cc machines and the 247 cc model in the mid-1950s Hercules range.
