Nowadays, the V-twin engine is ubiquitous in the motorcycle world. Powering everything from speedy sport bikes to massive touring machines — and even wedged sideways on some rides — the still-striking ...

A straight-twin engine, also called an inline-twin or parallel-twin, is a two-cylinder setup where both cylinders sit side by side, upright, and share a single crankshaft. It's the simplest way to ...