Triumph Motorcycles has a history of fitting large engines to its motorcycles. The 2025 Rocket 3 Storm currently holds the production motorcycle displacement record with its 2,458 cc inline triple.

The largest parallel-twin engine ever fitted to a production motorcycle is not some futuristic prototype, but a bruising British twin that quietly rewrote the rulebook on displacement and torque. It ...

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 ...