Acerbis Chain Guide YZ-F25/45 03-23 Black YZ125/250 05-23 AC-17952Product number: AC 17952 JAN: 0889143119936 A chain guide that prevents the chain from coming off or breaking. The 2 piece structure makes it easy to maintain. The 2 piece structure makes it easy to install and remove, as well as easy maintenance. Lightweight and made of resin material with sufficient strength and flexibility. It is also less likely to deform than metal. You can also dress up your look with its carbon look. Compatible models: YZ 125