The "good" sound of a motorcycle engine is subjective and can vary depending on personal preference. However, there are a few characteristics that many motorcycle enthusiasts appreciate in engine sounds:
Deep and throaty: A deep and resonant tone is often associated with a powerful and muscular engine. It can create a sense of excitement and presence.
Smooth and balanced: A well-tuned engine produces a smooth and balanced sound without noticeable vibrations or irregularities. This indicates good performance and mechanical harmony.
Aggressive and sporty: Some riders prefer a more aggressive and sporty exhaust note that emphasizes the motorcycle's performance characteristics. It can be characterized by sharper and higher-pitched tones.
Distinctive and unique: Certain motorcycle brands or models have their own distinct engine sounds that have become iconic and recognizable. These unique tones can evoke a sense of brand heritage and identity.
It's worth noting that the sound of a motorcycle's engine can be influenced by various factors, including the engine configuration (such as inline, V-twin, or parallel twin), the exhaust system design, and any aftermarket modifications.
Excessively loud exhaust systems can be disruptive and may violate legal restrictions.
Ultimately, the "good" sound for a motorcycle engine is a matter of personal preference. It's advisable to listen to different motorcycle models and exhaust systems in person, through videos, or at motorcycle events to determine the sound that resonates with you.