03-13 YAMAHA YZ450F: Hammerhead Case Saver (Blue) Hammerhead Designs was launched with the intent to provide new and better parts and innovative accessories for motocross bikes. One of Hammerhead Designs' goals has been to design entirely new and unique products with improved ergonomics.These case savers are the only case guard that is designed to allow for a larger countershaft sprocket (unless noted).Precision machined CNC 6061