Switching teams 'unfaithful' - Rossi
World champion Valentino Rossi has hinted he will leave Yamaha if they do not drop Jorge Lorenzo in 2011.
Italian Rossi, who won his ninth world crown this year, has also revealed he could switch allegiance to Ducati.
Lorenzo recently signed a new one-year deal with the Japanese firm but Rossi does not think there is room for the two riders in the same team.
"Yamaha have to decide between me and Jorge for 2011," Rossi told BBC Two. "I have a great option to join Ducati."
The pair have fought some incredible battles on the track this season, with the 30-year-old Rossi coming out on top and clinching the title with one race of the season to spare, while Lorenzo, 22, as runner-up.
But Lorenzo has said that he has not always felt appreciated at Yamaha and revealed he had received offers from other manufacturers before signing his new deal.
Now Rossi, who signed a two-year deal with Yamaha in August 2008, has made it clear he could make a switch.
"I am not sure 100% if I will stay with Yamaha," said Rossi. "It depends on what happens next year. It depends on my performance and the fight with Jorge Lorenzo and the decision of Yamaha for 2011.
"I could change bike, ride for Ducati and try to win the world championship with an Italian bike. That would be a great motivation.
"But I prefer at this moment to stay with Yamaha because the love between me and Yamaha, our relationship, is something special.
"To change bike would feel unfaithful. So for Yamaha it is important that I finish my career with them and for me it is also important. "