Casey Stoner makes winning start to 2010 MotoGP season with victory in Qatar . Australian triumphs on his debut for Honda Repsol team in his 24th race win . World champion Casey Stoner claims 24th place from 2011 rival Honda . Seven -time world champion Valentino Rossi back in seventh on Ducati debut .
Casey Stoner makes winning start to 2011 MotoGP season with victory in Qatar . Australian triumphs on his debut for Honda Repsol team in his 24th race win . World champion Jorge Lorenzo claims second place from 2010 rival Dani Pedrosa . Seven-time world champion Valentino Rossi back in seventh on Ducati debut .