1983 – The disappointing 1982 season got worse in 1983, confirming Medardo for the 125 but replacing Gritti with Fasola for the 250 class.
Chimoto, in Senago, an external company, took up the managing of the leftovers of the competition department, and thereafter also the racing department, which had already been reduced in numbers, was eventually discontinued and its best men were trusted with new tasks.
New experiments both with a four strike engine and with Tau 125 cc engines by eng. Trivelli were carried out trying to change the bad trend, but it all turned out to be useless as no funds were available.
Also the old frames were improved further, coping the competitors’ winning solutions, but it was unsuccessful.
The first tests of the bike, called RS GS – S1, started in February 1983; thereafter the first two bikes were manufactured, just on time for the first trial of the Championship, a 125cc powered TAU for Medardo and a 250 Rotax with air for Fasola.
The narrow funds available did not avoid SWM’s inexorable decline and it fell off from the top of the rankings.
At the end of the season, during the 48^th edition of the International Cycle and Bike Exhibition in Milan, SWM prepared a booth rich in novelties and proposals, which were never realized.

1984 – As a matter of fact in 1984 trade unions’ strikes, the long workers’ occupation of the plants and the heavier and heavier pressure of the banks led SWM in an irreversible bad situation.
After a few months of operating stoppage, with no hopes left to improve the situation, SWM’s administrators handed the accounting books to the Court, and the company went under a receivership situation.
At the same time, Piero Sirioni created the Società Veicoli Milanesi srl in Rivolta d’Adda, and the operative seat was located in the old plant in Via XXV Aprile, his aim was to start and continue SWM’s spare part activity, and produce the demanded models and create a new production, trying to exploit all materials still available at old SWM’s plants.