Download CAUTION: This shock is pressurized to 250 psi nitrogen. The pressure is not an adjustable feature of the shock. Unless the reservoir bladder assembly leaks, the shock should not normally lose pressure. If, after an extended period of time or number of miles, the damping becomes soft or mushy, the shock may need to be serviced which includes shock oil and a nitrogen charge. In this situation, re-pressurizing the shock alone may not improve the action of the shock. The shock should be returned to Works Performance Products, Inc. or to a qualified shop that has the appropriate tools, training and nitrogen handling equipment. SHOCK TYPES Works Performance Products, Inc. constructs two types of shocks for the ST1100. Both have an integral reservoir (often referred to as a “piggyback” reservoir) . This reservoir increases the shock fluid capacity. This additional fluid helps dissipate heat generated by the damping in the shock. The reservoir contains a polyurethane bladder which separates the nitrogen from the shock oil. The shocks differ in the external adjustments. RACER The Racer shock features a large 1.375″ damping piston and Works’ exclusive check-ball and orifice damping system. This damping system allows an extremely wide range of damping through the high-, medium- and low-speed circuits that are incorporated in the design. It has spring pre-load adjustment to change the ride height to accommodate changing loads.