According to interview from MotoGP.com to Filippo Preziosi, General & Technical Director of Ducati Corse, Preziosi confirmed that in Laguna Seca, Ducati will use the fourth engine as planned.
Preziosi said, "In Laguna we will seal engine number four as planned. Engine number four is ready to use some additional parts we are developing. Some parts could be delivered directly to Laguna, and some other parts will be delivered in the following races. This depends on the final result, and only when we are sure that these parts give us an improvement in terms of performance."
He continue, "Monday was a half test with Valentino because unfortunately we had a hardware problem. So for safety reasons we stopped his test. So we got only half the information we need. It was a good test for Nicky, because we tested a lot of interesting things. At the end he was quite happy. To be honest, Nicky was good all weekend. Valentino did a wonderful race, starting unfortunately far back, but the pace was really good. Overall it was a nice weekend."
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