Vintage Sidecar Motocross - 1980s Sidecarcross 

This footage of Sidecar Motocross or Sidecarcross is from 1984 and was broadcast on Screensport satellite TV.
Sidecarcross racing which is also known as sidecar motocross, is a branch of motocross. Regular motocross riders use solo machines, but a sidecarcross outfit has a different type of motorcycle chassis operated by a team of two people, a driver and a sidecar passenger. The earliest articles appear to show that sidecarcross started in the UK in the 1930s.