Italian motorcycling great Max Biaggi announced his retirement from the sport Wednesday. Biaggi, a former world champion in the 250cc category, went on to finish runner-up in both the 500c and MotoGp categories before turning his talents to the world Superbike series. The Italian posted a message on his Twitter account earlier Wednesday which read: \"Today is going to be a new day for me... things will never be the same.\" He later told reporters: \"I have officially retired.\"