Rossi has played a vital role in developing the YZR-M1 and their love story is one of the most famous tales in the world of motorsport.
The Doctor first tested the YZR-M1 in 2004 and tried trying multiple engine prototypes before choosing one that he labeled a sweet engine.
Rossi is first in all time 500cc/MotoGP race wins standings, with 88 victories, and second in all time overall wins standings with 114 race wins, behind Giacomo Agostini with 122.
Rossi won the regional kart championship in 1990. After this he took up minimoto and before the end of 1991 had won numerous regional races.
Rossi won his first 500 cc World Championship in 2001, winning 11 races in the final year of that class and collected 325 points.
The inaugural year for the MotoGP bikes was 2002, when riders experienced teething problems getting used to the new bikes.
It was more of the same in 2003 for Rossi's rivals when he claimed nine pole positions as well as nine race wins to claim his third consecutive World Championship, clinching the title in Malaysia.
This year, Sete Gibernau became his strongest opponent, beating Rossi several times, although Rossi got the better of Gibernau in the Czech Republic, by just 0.042 seconds.
Rossi's victory at the 2009 Dutch TT in Assen was Rossi's 100th victory, becoming only the second rider in motorcycle grand prix history – after Giacomo Agostini – to reach 100 wins.
The 2010 season began with Rossi topping most of all pre-season testing sessions and took victory in the first race of the season in Qatar, after early leader Casey Stoner crashed out.
Return to Yamaha
The text on his helmet refers to the name of his group of friends: "The Tribe of the Chihuahua," and the letters WLF on his leathers stand for "Viva La Figa," Italian for "Long Live Pussy."