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The new V4 will feature an incredibly compact front cylinder head design, with just one camshaft operating all eight valves in that head, while the rear cylinder head is a tech-fest incorporating the company's latest variable-cylinder and variable valve technology. It all comes in the desire to cut precious milimeters from the engine's length and height to create a tightly packaged machine.
The Honda VFR 1200 is said to feature a 1200-cc engine with selectable cylinder deactivation system. This feature will reduce fuel consumption by halting fuel supply to specific cylinders under low load conditions, such as when running at a constant speed on a highway.

Usually the front and rear banks of a V4 engine are mirror images of one another - a design that simplifies production and saves cost. But Honda is renowned for bucking the convention and the new V4 is no exception. The bike uses a completely different design for each cylinder head.The front head follows the design cues of Honda's CRF450 motocross bike, which saves weight and size on it's four valve single cylinder engine by using a single camshaft with three lobes to operate all four valves, marketed under Hondas Unicam trademark. The two outer lobes individually act on the intake valves, with the central lobe moving the exhaust valves via a Y-shaped rocker arm. The new V4 does exactly the same thing inside its front cylinder head, but with two cylinders, eight valves and a six lobe camshaft.