| MODEL | ZUNDAPP GS 125 1973 |
| Year | 1973 |
| Engine Type | Single cylinder, two-stroke |
| Displacement / Capacity | 123 cc / 7.51 cu in |
| Bore X Stroke | — |
| Compression Ratio | — |
| Cooling System | Air |
| Max Power | 13.1 kW / 18 hp @ 7600 rpm |
| Max Torque | — |
| Ignition | — |
| Induction | — |
| Start System | — |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | — |
| Clutch | — |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | — |
| Front Suspension | — |
| Rear Suspension | — |
| Front Brakes | — |
| Rear Brakes | — |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | — |
| Wheelbase | — |
| Ground Clearance | — |
| Dry Weight | 109 kg / 240.3 lb |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | — |
| Rear Tyre | — |
| FUEL SYSTEM | |
| Fuel Capacity | 10 Litres / 2.64 US gal (3 Litres reserve) |
| Fuel Consumption | — |
| Top Speed | 115 km/h / 71.5 mph |
The 1973 GS 125 is a light air-cooled two-stroke enduro with 18 hp and a dry weight of only 109 kg. It was offered in racing red or black.
