It sounds complex, and it is. Let's look at the plusses and minuses, and at some of the hints that the patent application may reveal. First, the date of the application is fairly recent: October 2009. While Kawasaki may have been working on the technology for years without revealing it, the date indicates that it may be pretty new and thus undeveloped. On the other hand, the patent drawings reveal a "real" looking set of parts, including full top views of an inline-four cylinder head. If it was a clean-sheet development, the patent drawings might have shown a single-cylinder conceptual layout.