SV.VM is an Italian motorcycle manufacturer founded in 1971 by Piero Sironi and Fausto Vergani. Based in Milan, SWM manufactured Observed Trials, Enduro, Motocross and off-road motorcycles in the 1970s and 1980s. They started with small capacity Sachs engined enduro bikes and began making Rotax engined trials bikes in 1977. The other main manufacturers at this time included Fantic Motor, Bultaco and Montesa.