This adjustable suspension link is crucial in balancing out the 2018-23 RMZ chassis. It has a performance setting (when the hole is placed in the forward position) and a lowering setting (when the insert is reversed). In performance mode it will reduce wallowing, improve ground clearance and put more preload on the shock. This setting only lowers the back of the motorcycle 8mm for a better balance point on the track. Recommended sag with the Rideng Link in P mode is 107/108mm with the fork height set at 5-7mm from flush. Flip the insert and you get a bike that sits 24mm lower than stock. Its ideal for trail riding or for shorter, less experienced riders. Warning in L mode the shock will be softer and much easier to bottom out.