The Regina 520 ZSE drive chain (135ZSE/1004) is a 120‑link chain made from high‑carbon alloy steel, featuring a narrow Z‑ring that reduces overall width and articulation friction for improved efficiency. It has gold-colored outer plates and is designed for Motocross and Enduro use. Supplied with rivet-type connecting links (Types 19/42/44). Color: gold.
Series/size: 520 ZSE; length: 120 links
Material: high-carbon alloy steel
Narrow Z‑ring: reduced width and articulation friction