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AMA
Wikipedia definition
1. AMA Motocross ChampionshipThe AMA Motocross Championship is the major motocross series of the United States, held since 1972. It is sanctioned by the American Motorcyclist Association and managed by MX Sports Pro Racing. The series began in 1972 with the introduction of two classes based on 500 cc and 250 cc engine formulas. A 125 cc class was added in 1974.
Read “AMA Motocross Championship” on English Wikipedia
Read “AMAモトクロス” on Japanese Wikipedia
Read “AMA Motocross Championship” on DBpedia

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