Silva has made occasional substitute racing appearances in MotoGP. After appearing in 2005 he filled in for D'Antin at Donington Park and Brno in 2006, as their regular rider Alex Hofmann was filling in for Sete Gibernau on a works Ducati. Despite targeting a full-time ride for 2007, he remained in a testing role, but again raced for the team at Brno, this time replacing an injured Hofmann. He noted that "I am happy to have the possibility to run in MotoGP again, especially this year where we have at our disposal the best tyres and bike of the moment", although his performance disguised this fact – he finished last in every practice session and in qualifying, despite Casey Stoner taking pole on identical equipment. He also entered the 2005 Superbike World Championship round in Qatar for the La Glisse team, taking 7th place in the one race his bike finished.

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() (Races in bold indicate pole position) (Races in italics indicate fastest lap)

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