These engines are an adaptation of the commonly known 'V'-twins because one cylinder lies horizonatally flat (like the Hero Honda CD-100/Splendor engine) while the other is vertical. The 'V' angle being obtuse the vertical cylinder is tilted backwards.
Some of the legendary Desmo and Testastretta engines.
So here are some sample images. Do visit the links below form some greater images with text to accompany it. Check out the multi-Valve and Dual Spark heads!

In profile

Liquid Cooled

Air Cooled

DOHC (Dual Over-Head Camshaft) Mechanism

Heavy Breathing 3 Valve Head

3-D CAD rendering.

Camshaft Drive Belt!
This link takes you to the latest engines, with description:
Some more legendary engines with description:


ain't it a beauty..
. Luckily it was moved to a correct forum today!

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