MotoGP world champion Valentino Rossi is set to stay in the sport despite plans to slow it down from 2007.
Rossi backed plans to cut engine power by reducing maximum capacity of engines 800cc from 990cc on grounds of safety.
The Italian four-time world champion was speaking ahead of this weekend's British GP at Donington.
"I am quite sure that I will stay with motorbikes when the 800s arrive because I want to stay for not just one year more," said the 26-year-old.
Safety fears force MotoGP changes
"Maybe it is also better because it's another experience, it's like starting from zero again so it's not so bad.
"I also think it's a clever modification of the rules because if not, maybe the bikes will start to go too fast."
For next year I'm quite OK with Yamaha, but in the future I don't know what happens
World champion Valentino Rossi
Rossi has been linked with a move from two wheels to four and a switch to Formula One, but he said he was unlikely to make the move.
"I have a great passion for four wheels, especially rallying, and I started with go-karts when I was a child," he said. "But I think it's very difficult.
"It's completely another world, a lot of work, a lot of pressure. Maybe a long holiday is better."
Donington is one of Rossi's favourite tracks but he expects a tough challenge from the American duo of Nicky Hayden and Colin Edwards at this weekend's British Grand Prix.
Hayden won last time out in America.
"Nicky and also Colin are very tough now," he said.
"Now they are at the top and they are always fast at Donington so I think I need to fight again with the two Americans."
Rossi may be staying in MotoGP but he is not sure whether he will still be with Yamaha in 2007, and he has not ruled out a move back to former team Honda.
"For next year I'm quite OK with Yamaha, but in the future I don't know what happens.
"Maybe I try to change to another bike, or come back to Honda, or another manufacturer."