09-14 YAMAHA YZF-R1: Yoshimura Case Saver Kit (Works Edition) Designed to reduce damage to the factory engine case covers in the event of a light crash or scrape, these Case Savers are just enough to help get you back to the pits or back home without having to worry about losing oil. Developed with CAD software. CNC machined from high-quality, billet 6061-T6 aluminum to keep your bike light while providing great strength. Each Case Saver is Magnasonian&trade; finished or anodized to improve durability and looks. With a CNC-machined Yoshimura logo.