This weekend's Aragon MotoGP will see the grand prix debut of the Ducati GP14.2.

The revised bike is an 'evolution' version of this year's Desmosedici and only available to Andrea Dovizioso and future team-mate Andrea Iannone, currently at the satellite Pramac team.

The GP14.2 marks the biggest technical change for the reconstructing Ducati project since the start of the season and a step towards the full 2015 re-design by new Ducati Corse general manager Gigi Dall'Igna.

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However Iannone has not yet made a clear performance comparison.

"This weekend I have two bikes, a GP14 and a GP14.2," he confirmed. "I tried this [14.2] bike at Mugello on Tuesday. But it is very difficult, because for me not improve a lot and it was not possible to compare the two bikes because I did not have a GP14 at Mugello. So tomorrow I will compare the two bikes and use the one I prefer."

While the GP14.2 appears unlikely to cure the long-standing understeer problems in a single sweep, Iannone added that the biggest benefit is in terms of riding position. "With the new bike I was immediately at ease and I like the riding position more. The bike is narrower than the GP14."

The GP14.2 will not be available to Dovizioso's team-mate Cal Crutchlow or Iannone's team-mate Yonny Hernandez.