Jedek came to prominence in 1981 after reaching the final of the 1981 Individual Speedway Junior European Championship.
[1] He competed in the individual championships of Czechoslovakia and the Czech Republic from 1981 until 1998, winning a bronze medal in 1986 and 1991.
[2] He also raced longtrack and competed in the final of the 1987 Individual Long Track World Championship.
[4][5] Jedek raced in the Team Speedway Polish Championship from 1991 to 1992.
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