Team-mates and title leaders Valentino Rossi and Jorge Lorenzo have confirmed that Yamaha's 2016 bike was their top priority during a recent private test at Aragon.

"The main reason for the test was to try the new bike, for next year," Rossi said at Misano on Thursday. "The Japanese wanted me and Jorge to try the new bike because usually we test at Brno on the Monday, but it rained.

"So before sending the new bike back to Japan they wanted to make some kilometres and get some feelings from me and Jorge about the bike.

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"It wasn't 100% important because we tried the bike with Bridgestone tyres, so after the new bike is modified for the [2016] Michelin tyres, but we need to do kilometres and the feeling is not so bad.

"After we test also with our [2015] bike. Unfortunately the next day it rained, but we did some laps and tried to understand some settings that could be of help for the [Aragon] race.

"I think [Jorge and I] were very close with the lap time."

Lorenzo elaborated further on the lap times, whilst revealing that some parts tested could be used this season. That would suggest chassis modifications, since electronic and engine upgrades are no longer possible during the season.

"We used the new bike for next year with Bridgestone tyres, so it will be the bike to use with the Michelin tyre. With the Bridgestone it was ok, a little bit better in some aspects [than the 2015 bike]. But unfortunately we cannot use it in this season," Lorenzo said. "We also tried some things that maybe we can use during these last six races.

"Finally I think in the dry I was a little bit faster [than Valentino]. We didn't have the [timing] screen but both have some guys checking the lap times of the other. In the rain I felt good at the beginning but at the end, in 'qualifying', Vale put a new tyre and beat me! So 1-1 let's say."

Rossi leads Lorenzo by twelve points heading into this weekend's San Marino round. The Aragon MotoGP takes place at the end of this month.