AMA Pro Racing POMONA, Ca. Sunday, October 16, 2011 Bauman Wins Another Motorcycle-Superstore.com Pro Singles Final; Martin Takes Championship 66_P1015D3-340.jpgJake Johnson took home the coveted AMA Pro Flat Track Harley-Davidson Insurance Grand National Championship presented by Motorcycle-Superstore.com No. 1 plate Saturday night with a commanding win at the AMA Pro Flat Track Season Finale, which took place on the big cushion half-mile at the LA County Fairplex in Pomona, Ca. In the weeks leading up to the culmination of the 2011 AMA Pro Harley-Davidson Insurance Grand National Championship, calculators were buzzing as everyone tried to analyze what combinations of finishes by the top three were needed for the Championship.