Why is the engine of the Tianhong 90 motorcycle so quiet?

[LaCayden]

Tianjin Honda's Tianhong 90 uses an imported engine with superior manufacturing processes, resulting in minimal operational noise. Additionally, the exhaust pipe's excellent noise reduction contributes to the overall quietness. Advantages of the Tianhong 90: As of now, it is the best joint-venture motorcycle available. It features a quiet engine, low fuel consumption, excellent build quality, stable performance, and outstanding adaptability. Comparable to imported models, it is ideal for beginners to familiarize themselves with motorcycle operations, offering a very relaxed riding posture. Disadvantages of the Tianhong 90: The quality control is average, with subpar components like turn signals, license plate tail lights, and footrests. The lower gears are practically useless, requiring quick shifts from 1st to 4th gear within 7 seconds at traffic lights, with 5th gear being the optimal cruising range.