Yamaha will keep Valentino Rossi's place open for the next couple of races before calling up a stand-in for their injured MotoGP champion.
Team manager Davide Brivio has told the official motogp.com website that there's n rush to replace the Italian, who is likely to miss most of the rest of the season after breaking his leg in practice for the Italian Grand Prix at Mugello.
Rossi, 31 and a nine-times world champion in all categories, is expected to be out for between four and five months..
Under MotoGP regulations, a team must replace an injured rider after two races without him.
The season ends in Valencia, Spain, on November 7.
Spain's Jorge Lorenzo, the championship leader who has already proved to be Rossi's toughest team mate this season, will be the team's solo rider at Silverstone in Britain next week and at Assen in the Netherlands on June 26.