V-twin engine

A V-twin is a two-cylinder engine with the cylinders set at an angle to each other, forming a V, and usually sharing one crankpin. It is compact from side to side, produces strong torque and has a characteristic pulsing sound.

Different makers use different layouts. Harley-Davidson is known for its 45-degree V-twins mounted along the frame. Ducati uses a 90-degree layout with one cylinder almost horizontal, often called an L-twin, which gives very smooth running. Moto Guzzi mounts its 90-degree V-twin across the frame, with the cylinders sticking out to the sides. Suzuki, Honda, Aprilia, KTM and others have also built V-twins.

The V angle and crankshaft design affect vibration, firing order and sound, which is why V-twins can feel very different from one another.