In it, a guy who goes by the name Le Dan on YouTube decided to build himself a teeny, tiny little Yamaha scooter with a crossplane inline four-cylinder engine. No, no, don't misunderstand me.

Yamaha has confirmed it will introduce its new V4 engine in MotoGP next season, so long as it's clearly faster than the inline-four ...

Yes this series 847–890 cc (51.7–54.3 cu in) liquid-cooled four-stroke 12-valve DOHC inline-three engine with crossplane crankshaft and a lightweight cast alloy frame.