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BEO/LCR - Rolf Biland (B2B) - Banned by FIM
Prior to 1977, the racing sidecars were similar to road going sidecars. A traditional racing outfit was a road going motorcycle outfit without the boot and with the suspension lowered. The bootless sidecar frame would have a flat platform. Both the battery and the gas tank would be placed either between the motorcycle and the sidecar, or on the sidecar platform. Overtime the subframe, struts, clamps, sidecar frame, etc. would merge with the motorcycle mainframe and form a single frame. But essentially the racing outfit was still a variant of the road going outfit in principle.

In 1977 George O'Dell won the championship using a Hub-center steering sidecar called the Seymaz. Then in 1978 Rolf Biland won the championship using a sidecar called BEO which was a rear-engine rear-drive trike. To keep up with technological innovations, in 1979 the FIM split the championship in two: One for traditional sidecars (B2A), another for prototypes (B2B). The B2B championship was won by Bruno Holzer using an LCR that turned the act of motorcycle riding into the act of car driving, including sitting on a driver's seat and using foot pedals and a steering wheel. Neither the BEO nor the LCR required any participation from the passenger. The former only required Kenneth Williams to sit on his seat, while the latter only required Charlie Maierhans to lay flat down on the passenger platform. Due to the high cost of technological development, the non-active participation of the riding passengers, and the fear that sidecars would eventually become something that has nothing to do with motorcycles, in 1980 the FIM banned all prototypes. But in 1981 the FIM reversed its decision due to protests from competitors, and allowed prototypes again. However the FIM and the competitors reached a compromise involving the rules: A sidecar must be a vehicle that is driven only by a single rear wheel and steered by a single front wheel, the driver must use a motorcycle handle bar as opposed to a steering wheel for steering, and there must be active participation from the passenger. The only ban that still exists today is the ban of using trikes or cyclecars.

The 1981 rules remain largely unchanged to this day, with the exception that during the late 90s the FIM finally allowed the use of car type suspension for the front wheel, such as the wishbone suspension. Sidecars that are outside of the technical rules can still compete in racing events, but would not be able to score or record their positions officially. An example would be the team Markus Bösiger/Jürg Egli, who achieved several high placings in the 1998 season using a sidecar in which Bösiger sat driving instead of riding. Even though they were allowed to race, their results were not classified in the official records. They would have finished third in the championship.

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