Ducati team-mates Valentino Rossi and Nicky Hayden crammed in the laps during Wednesday's Aragon MotoGP test.
The pair rode for 78 laps (Rossi) and 66 laps (Hayden), both recording a best time one-second behind fastest man Jorge Lorenzo.
“The day started out pretty well, as we were able to make a couple of good steps straight away,” said sixth fastest Hayden. “This afternoon we tested some bigger parts for Ducati and weren't able to go faster.
“Of course we'd like to be closer to the top, but we got some good data, and hopefully we can put it all together soon with a good result.”
Pramac Hector Barbera was once again fractionally faster than the factory riders over a single lap, although a late technical glitch cost Rossi a late soft-tyre run.
“I'm just sorry to have had a small problem at the end of the session,” said Rossi, who was eighth fastest. “Maybe a cable in the ECU broke, so I was stuck in the garage for fifteen minutes, which prevented me from using the second soft tyre that I had available. Otherwise, I think I could have been a little bit better.”
Neither factory rider used the new aluminium swing-arm.
“We didn't have enough time to try the aluminium swingarm again, but since we found some positive things, we can say that it was a good test,” said Rossi.