Herbert 'Bert' le Vack (1888 London – 16 September 1931 Berne, Switzerland) was a motorcycle world speed record holder throughout the 1920s and earned the nickname the 'Wizard of Brooklands' for his exploits at Brooklands. An expert racing engine tuner, le Vack worked for some of the great marques and in the late 1920s joined Motosacoche in Switzerland as the works rider, chief designer and tuner. Le Vack was killed in a sidecar accident on 16 September 1931 near Bern, but is generally regarded as being one of the greatest racing motorcyclists of his day.