This change seemed to have favored the Bridgestone's wider performance range over the more temperature- and track-specific Michelins.
Aoyama ended the 2007 season in sixth place in the 250 championship with victories in Germany and Malaysia.
These have included The Japanese Grand Prix at Motegi, where he finished 13th on his debut with the Rizla Suzuki team as a wildcard rider, as well as two races in 2007 at Jerez and Japan.
He suffered a serious accident in the 2007 Czech Republic Grand Prix at Brno, where he struck Marco Simoncelli's Gilera bike at full speed.
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