Ducati is not going to burn through engines just because the rules allow them to. I'm figuring they will need 7 engines at most. The current ones, 2 iterations to optimize the geometry/location, and then at most another 3-4 versions of the engine that works. I really doubt they will try multiple engines per race or even change engines every weekend as it will take time for them to figure out how each engine works at different tracks. So 9 is plenty.“Though fans were quick to point out the gaping holes in the Factory 2 regulations – what happens if Ducati wins a race on its 9th engine, or its 10th engine? – in practice, there is zero chance of that happening. In 2013, Ducati managed the season successfully with just 5 engines, so there is no reason to expect that they would need much more than that in 2014.”
I take this article with a grain of salt. I don’t think the above scenario of Ducati winning a race on the 9th or 10th engine is as impossible as he seems to think. Last year they HAD to survive with fewer engines, this year they do not.