YSS shock absorber MZ456-300HR-37 for Yamaha FZ 750 Genesis 87-90. The YSS suspension MZ456 Topline series is a Nitro gas supported shock absorber. The offered shock is specifically developed for your motorcycle model. Hydraulically adjustable on spring-preload and rebound damping. The shock is approved by the German T�V for German and Swiss KBA-ABE. For model specific ABE approvals please check www.suspension-store.com/ABE_downloads. YSS offers a 2 year full factory warranty.