| MODEL | HERCULES K 125 S 1979 |
| Year | 1979 |
| Engine Type | Single cylinder, two-stroke |
| Displacement / Capacity | 124 cc / 7.57 cu in |
| Bore X Stroke | 54 x 54 mm / 2.1 x 2.1 in |
| Compression Ratio | 11.8:1 |
| Cooling System | Air |
| Max Power | 12.4 kW / 17 hp @ 7500 rpm |
| Max Torque | — |
| Ignition | — |
| Induction | Port control |
| Start System | — |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 6-speed |
| Clutch | — |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | — |
| Front Suspension | — |
| Rear Suspension | — |
| Front Brakes | Single disc |
| Rear Brakes | Drum (expanding brake) |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | — |
| Wheelbase | — |
| Ground Clearance | — |
| Dry Weight | — |
| Wet Weight | 122 kg / 269 lbs |
| WHEEL SPECS | |
| Front Tyre | 2.75-17 |
| Rear Tyre | 3.00-17 |
| FUEL SYSTEM | |
| Fuel Capacity | 11 Litres / 2.91 US gal |
| Fuel Consumption | — |
| Top Speed | 117 km/h / 72.7 mph |
Sporty road version of the air-cooled 124 cc two-stroke Hercules, higher compressed and making 17 hp through a six-speed gearbox. It uses a front disc brake with 17-inch wheels and weighs well under the Military model, making it a lively small-capacity machine.
