Pro X Cam Chain Yamaha Yz250F / Yz250Fx Crafted in Japan by Borg Warner, Pro X cam chains are engineered as perfect replacements for standard cam chains, ensuring reliability and performance that either meets or surpasses OEM standards. Features: Strong M-Type chain with heat treated pins Advanced pin and link connections for maximum performance and durability Made in Japan by Borg Warner, supplier for many OEMs