Spain's 250cc double world champion Jorge Lorenzo has been confirmed as Valentino Rossi's MotoGP teammate at Yamaha next season, as the squad also confirmed the five-time MotoGP world champion will run on Bridgestone tyres next season.
Yamaha released a statement saying that Rossi would change tyre manufacturer while 20-year-old Lorenzo would race with Michelin tyres.
Rossi has had problems with the Michelin tyres on his Yamaha for much of this season.
The team said that in order to ensure confidentiality for each tyre company, the two riders would have separate pit boxes and managers.
Lorenzo, who won this year's 250cc title for Aprilia, finished seventh in Sunday's season-ending Valencia Grand Prix.
Rossi came third in this year's MotoGP championship behind Casey Stoner and Dani Pedrosa when he was forced to drop out of the Valencia race on Sunday with a technical problem after deciding to ride with a broken hand sustained in a qualifying crash.
It was the first time the 28-year-old Italian had finished outside the top two in any category since he was ninth in his rookie season in the 125cc class in 1996.
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