The Runner Bullet 100 is driven by a 100.54 cc single-cylinder SOHC engine, designed with a 4-stroke dual-valve setup and air cooling for efficient performance. Its compact engine design ensures smooth operation and reliable fuel combustion, making it suitable for daily commutes. The bike emphasizes simplicity in its engineering, focusing on durability and ease of maintenance. It caters to riders seeking a balance between cost-effectiveness and essential performance capabilities.