For many riders the distinctive exhaust note (a Royal Enfield motorcycle sound, often erroneously referred to as the 'thump') is an important part of the appeal of a Royal Enfield motorcycle. The introduction of a smaller 250cc engine into the Classic lineup has sparked a lot of talk as to whether this new model will be able to capture the iconic sound. Some enthusiasts claim that the smaller displacement will mean an altogether different, and possibly less satisfying, exhaust note. Some others are hoping that Royal Enfield's engineers have figured out how to tune the exhaust to sound like the beloved thump of the bigger models. This is a question that goes to the core of what Royal Enfield is and its fan base are expecting from their brand.