Valentino Rossi with Ducati - the Valencia MotoGP test

The test marked the debut of Valentino Rossi with Ducati, Casey Stoner with a factory Honda, Cal Crutchlow with Tech 3 Yamaha etc.The next official MotoGP test will be at Sepang in February.Ducati has pledged to improve its MotoGP machine after superstar signing Valentino Rossi was left just 15th fastest at the end of his Desmosedici debut at the Valencia MotoGP test.Rossi's best time was