Sherco Rear Shock Bump StopFoam bump stop as found on the rear suspension shock absorber unit, used to prevent harsh bottoming out. Fitting requires the spring to be removed and the top of the shock to be unscrewed, to do this the shaft on the shock has to be held securely but without damaging the surface so a special tool will have to be made we recommend drilling a hole the same size as the shaft in a piece of aluminium and cutting it in half so the shaft can be clamped in