sentences:  Riders from Australia and the United States have traditionally been successful in the world championship.No American rider had won a race since Colin Edwards won the 2002 championship until Ben Spies joined the series in 2009, but no Americans competed in the series between 2003 and 2007.British rider Carl Fogarty had long been the most successful rider in the championship's history, winning the championship four times, and amassing a total of 59 race wins.