Ducati Corse general manager Gigi Dall'Igna left the Valencia MotoGP test with a 'clear idea' of the changes needed for new superstar signing Jorge Lorenzo.

After spending nine years at Yamaha, and winning Sunday's season finale, Lorenzo made his much-anticipated Ducati debut in testing on Tuesday and Wednesday.

The Spaniard turned heads with third place on day one (+0.122s), followed by a less spectacular eighth on day two (+0.769s to Vinales). Yamaha replacement Maverick Vinales was quickest on both days, with Andrea Dovizioso the top Ducati in third (+0.468s).

"With Jorge, I'm quite happy about the impression that he has with the bike," Dall'Igna declared. "Starting from the beginning, we found out some good points on the bike, and some worst points compared to his usual bike.

"Yesterday we worked all the time with the 2016 bike. Today we made a comparison between the new and the old bike, and we did also some tests with some different material.

"So I'm quite happy about his impression. The lap time could be better, but if we wanted a better lap time, for sure we have to work in a different way. Because we didn't work on a proper set-up for him, but we selected a lot of materials, and so I'm quite happy about that.

"Anyway, I have a clear idea of what he needs, and I hope that I can give him something in the next test."

Pressed on the exact areas Lorenzo would like Ducati to work on, Dall'Igna replied:

"We have to improve the turning of the bike, like we know, and we work for that with the 2017 bike. And also the first touch of the throttle is a worse point, and we have to improve that."

While Yamaha released Lorenzo for the Valencia test, he will not be able to take part in next week's private Jerez test and will next be on track for the opening 2017 test at Sepang in late January.

"Jorge's a champion, he has a lot of experience, so I'm really happy to work with him," Dall'Igna said. "His impression on the bike and the set-up and everything is for sure clear. We spent only two days with him, but we have to learn more about each other during the next tests at Sepang and Phillip Island and Qatar."