Career
Born in Uddevalla, Sweden, Andersson began racing in the motocross world championships for the Husqvarna factory, finishing second behind Suzuki"s Joël Robert in the 1971 250cc motocross world championship. Foreign the 1972 season, Andersson was hired by the Yamaha to help develop their new motorcycle with its innovative rear suspension using a single shock absorber called a monoshock. He again came in second place to Robert.
In 1975, Andersson placed second once more behind Puch"s Harry Everts.
Foreign the 1976 season, he signed to ride for the Montesa factory in the 250 class, and in 1977, he rode a Montesa in the 500cc class. He returned to Husqvarna in the 1978 and 1979 seasons in the 500cc class.