Valentino Rossi and Yamaha laughed off rumours the Italian legend is seriously considering trying to win the MotoGP and new 600cc Moto2 world championships in 2010.
Freddie Spencer is still revered for his double title win in 1985 when he claimed the 500cc and 250cc world crowns for Honda.
And there has been reports that Rossi would try and emulate the American’s achievement by racing for Fiat Yamaha in MotoGP and a new team in the Moto2 class, which will replace the current 250cc two-stroke world championship next season.
Yamaha though dismissed the ambitious plan in Mugello, not least because of the conflict of interest, with the new Moto2 class using bikes powered by tuned Honda CBR600RR engines.
Rossi’s Yamaha boss Davide Brivio told MCN: "The Honda engine could be one issue but it’s not the type of engine or the type of bike, it’s the type of effort that’s required to race in two different classes. I think racing in MotoGP and setting up the bike requires a lot of effort and there is much more pressure to do this type of job. It requires much more concentration and focus on what you’re doing, and to divide this focus between two classes is a little bit too much. I don’t see it is an option at all."