From Engineering Explained.

Ducati’s V4 Engine Is Unlike Anything Else – Here’s Why They Do Things Differently!
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With four-cylinder engines, there are many great reasons to go with an inline layout, especially in cars. But in motorcycles, there are many great reasons to go with a V4 layout, as I’ve explained in my previous video on Ducati V4 engines. Once you’ve narrowed it down to a 90-degree V4, meaning two-cylinders on one bank, and two cylinders on another bank 90 degrees apart, there are three obvious options for your crankshaft (0º, 90º and 180º crank pin splits), which significantly change the characteristics of the engine. Which one does Ducati for their modern V4? None of them. Instead, they opt for a 70º crank pin split. It’s a seemingly bizarre choice, but it’s actually very smart, so in this video we’re going to explain why Ducati does it the way they do it.

This will also help answer the question why Ducati bikes sound so good, which of course is subjective, but there’s a real science behind that sound.

Related Videos:
Ducati V4 Part 1 – https://youtu.be/uA-kglFSq5I
Primary Forces – https://youtu.be/9Bdc9CuBOzc
Secondary Forces – https://youtu.be/gdHQ8aTfiQQ

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