This is a complete top-end rebuild kit for the Honda TRX520 Foreman and Rubicon ATVs from 2020 to 2024. It includes a cylinder (96mm big bore), piston (standard size), piston rings, wrist pin, circlips, spark plug, and all the necessary gaskets (base, head, and valve cover). OEM part numbers are 12100-HR6-B00 and 13101-HR6-B00. Everything is made from aluminum and iron for durability, and it's a direct bolt-on kit—no modifications needed. Perfect for an engine overhaul or performance rebuild.