The 20-year-old had earlier said he'd decide whether to move to 500s with Honda or stay in 250s with Aprilia as soon as he'd secured the crown. 

Aprilia has offered Rossi $4 million to stay with the Italian factory but the Italian is aware that if he turns down Honda's advances, he may not get another chance to ride the best bike in the 500 class. 

"I have to be careful," said Rossi in Rio. "I know that if Honda offer me whatever I want - the money I want, the team I want and so on - and I turn them down, maybe they won't ask me to ride for them ever again. But if we can't agree on which team, money and that kind of thing, maybe we can talk again another year when I'm ready to make the move."