The new Factory Aprilia Gresini team will have pneumatic-valve engines for the start of 2015 MotoGP testing at Sepang, with a seamless gearbox to follow in the first half of the racing season.

That was the pledge of factory racing boss Romano Albesiano, speaking to the official MotoGP website at the conclusion of Wednesday's Valencia test - the first outing for race riders Alvaro Bautista and Marco Melandri on the ART machine.

"On Monday we tested the pneumatic valve engine. Okay the top speed we knew was much better, but most importantly the character was still similar to the 'CRT' bike [ART designed for previous CRT rules] let's say, which is a positive point with our engine. So it looks good," Albesiano said.

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"For Malaysia we will have some steps coming with the chassis side, but basically the motorcycle will be this one, with the pneumatic valve engine."

The Italian, who oversaw Sylvain Guintoli's 2014 World Superbike championship victory, added: "We are testing the seamless [gearbox]. We are at an early stage so we are planning to use it in the first half of next season.

"In 2016 we will have a brand new bike, which is optimised in every aspect. This season is a kind of laboratory season to get information for next year, but we will of course try to get good results."

Bautista was 18th (+1.8s) and Melandri 26th (+3.4s) on the combined Valencia test timesheets.