Composition and Advantages: 420/428 motorcycle chains（https://www.chainmanufacturer.net/product/motorcycle-chain/） are typically composed of several key components: Inner and Outer Plates: The inner and outer plates provide the primary structure and support of the chain. They are designed to withstand heavy loads and high-speed applications, ensuring reliable power transmission. Rollers: The rollers allow the chain to smoothly engage with the sprockets, reducing friction and enhancing efficiency. These components are designed for durability and optimal performance during motorcycle operation. Pins: The pins serve as the connecting elements between the inner and outer plates and rollers. They are hardened and ground to endure the stresses of power transmission while maintaining the integrity of the chain. O-Rings (in O-Ring Chains): In O-ring chains, O-rings seal the lubricant inside the chain, reducing friction and preventing dirt, debris, and moisture from entering, thereby increasing its durability and longevity.