Former MotoGP champion Valentino Rossi has warned Yamaha he could move to rivals Ducati in 2009 if they do not make major improvements next season.
Rossi finished two places behind MotoGP champion Casey Stoner
The five-times champion has missed out on the title for the last two seasons.
"If it gets better I can wait another year. If not there is nothing left to do," he told Italian website La Gazzetta dello Sport.
"I have a good relationship with both Ducati and Honda but I would prefer Ducati because they are Italian."
Rossi, 28, finished in third place in this season's riders' championship, the first time he has finished outside the top two since his rookie season in 1996.
Yamaha recently announced that Spain's 250cc double world champion Jorge Lorenzo will be Rossi's new team-mate next season.