http://images.yamaha-racing.com/photo/news/P20090201230717921.jpg<div>The fifth round of seventeen in the 2009 AMA Supercross Championship (also an FIM World series) in San Francisco was owned by LandM San Manuel rider James Stewart with his YZ450F for the fourth time this season and for the fourth meeting in a row. The 23 year old has soared up the standings since his unlucky DNF at the opening event and now li

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