SIS was an important Portuguese motorbike and moped manufacturer, based in Anadia. In addition to motorbikes it produced light three-wheeler pickup trucks. Its products used Sachs engines and were quite successful in the local market, especially in the 1970s. SIS Sachs exported to USA, Germany, Austria, Greece, Morocco, Angola and Mozambique. The most iconic model was the SIS Sachs V5 produced from 1965 until the 1980s with several upgrades and different versions.