The bikes may look smart finished in blue with the signature Yamaha ?speed block? motif, but the livery reveals that attempts to find a title sponsor for the 2011 season have failed.

Current World Champion Jorge Lorenzo remains with the team to defend his title, while replacing Valentino Rossi is Ben Spies, who moves up to the works outfit following a year at independents Tech 3.

The 2011 MotoGP championship commences on March 20 with the Grand Prix of Qatar.