Motorcycle engines are, in essence, pretty easy and simple to understand, right? I mean, there can only be so many different types of engines out there, from single-cylinder mills to the ubiquitous parallel and V-twin motors.
Of course, we can’t forget about the buttery smooth triples and howling in-line fours. There are also a few horizontally opposed (boxer) and six-cylinder mills from some manufacturers out there. But that’s about it.
Well, as it would turn out, motorcycle engines aren’t as clear-cut as we’d like them to be. Take, for example, QJ Motor and its oddball engine that isn’t exactly sure whether it wants to be a single-cylinder or a V-twin. As you can see in the image above, the engine sort of looks like a V-twin, but you’ll notice that the rear cylinder is much shorter and narrower than the front cylinder. But why?
