The FIM, motorcycling's governing body, has announced that the new Moto2 category will use a single brand of engine.
The possibility of identical engines was mooted when details of Moto2 were first outlined last autumn, but this issue was not mentioned when initial regulations were released in December 2008.
But in a press conference at Jerez today, FIM president Vito Ippolito said agreement had now been reached to seek a single engine supplier for Moto2.
"In the case of Moto2, there is some news," he said. "This is a proposal coming from the manufacturers. The proposal is to have one-make engine regulations. That means that we will have one brand of engine (only) in the Moto2 class."
Moto2 will replace the 250cc class as MotoGP's primary feeder category from 2011. The single engine will be a 600cc, four-stroke unit. Chassis choice will remain free.