| Designation: | Sachs 505/1A | |
| Design: | Single cylinder two-stroke gasoline engine | |
| Cooling: | Airstream-cooled (just like my VW) | |
| Capacity: | 47 cc / 2.87 in³ | |
| Bore: | 38 mm / 1.5 in | Stroke: | 42mm / 1.66 in |
| Compression: | 8 | |
| Output: | 1.3 kW / 1.8 HP @ 4500 rpm | |
| Engine lubrication: | Oil / gas mixture of 1:50 | |
| Gearbox: | Helical teeth spur gearwheels | |
| Gearbox lubrication: | 250 cc of speaial Sachs gear oil (10W30 or 10W40 works just as well) | |
| Clutch: | Twin-plate centrifugal clutch with hand-operated starting clutch | |
| Ignition: | 6V 17W to 23W | |
| Spark advance: | 2.5±3 mm / 25-28 degrees before TDC | |
| Ignition point gap: | 0.4±0.05mm | |
| Spark plug: | Bosch W7A (W175T1) with SAE connecting nut | |
| Spark plug gap: | 0.5 mm | |
| Carburetor: | Bing single slide | |
| Air filter: | Paper air filter in intake silencer with built-in starting device (choke) | |
| Exhaust pipe: | 26 x 400 mm external, 24 x 200 mm internal | |
| Engine sprocket: | 11 teeth |