Rats - Notte di terrore
One hundred years after a nuclear war has devastated the planet, society has been reborn into two factions; the underground society and the scavangers above in the wastelands. A group of scavangers on bikes come across a town infested with flesh eating rats, and soon the gore is spilling everywhere.
BMW? The sidecar Windscreen reminds me a Motoguzzi Falcone 500 or early V7, both Police
Ural or BMW (look to opposite engine)
The bike with the girl on is a Motoguzzi, probably 850 GT or similar
if the front brakes and telescopic fork original.. so it's was a 1973 BMW R 90S