User:Bri/FIM rules

Supercharger ban in FIM racing
 * Online book sources
 * and page 107
 * ex-Kurt Kuhnke,1937 DKW 250cc Supercharged Racing Motorcycle at Bonhams
 * Classic Motorcycle Racing Engines, Kevin Cameron: after the ban, the previously supercharged Gilera 500 didn't perform well, so in 1948 Gilera redesigned the engine and created the 500-4. It was the mother (words?) of subsequent four-stroke inline fours that have dominated motorcycle racing since then. (credit Dennis)
 * L.J.K. Setright A History of the World's Motorcycles p. 153: In 1946, the first postwar motorcycle show was held, and racing resumed. The same year, superchargers were banned and race fuel was limited to 72 octane. (credit Dennis)
 * ex-Kurt Kuhnke,1937 DKW 250cc Supercharged Racing Motorcycle at Bonhams
 * Classic Motorcycle Racing Engines, Kevin Cameron: after the ban, the previously supercharged Gilera 500 didn't perform well, so in 1948 Gilera redesigned the engine and created the 500-4. It was the mother (words?) of subsequent four-stroke inline fours that have dominated motorcycle racing since then. (credit Dennis)
 * L.J.K. Setright A History of the World's Motorcycles p. 153: In 1946, the first postwar motorcycle show was held, and racing resumed. The same year, superchargers were banned and race fuel was limited to 72 octane. (credit Dennis)