YSS shock absorber MX456-345TRW-33-888 for BMW G 650 X Challenge 07-11. The YSS suspension MX456 W series is a separated Nitro gas supported shock absorber with reservoir on a hose. The offered shock is specifically developed for your motorcycle model. Adjustable on spring-preload, rebound and separated Hi and Low speed compression. The shocks are approved on safety and use by the German T�V KBA ABE. YSS offers a 2 year full factory warranty. This shock absorber is fully serviceable.