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. PRO RACER The Pro Racer shock features a twin tube design with external compression and rebound adjustments. This design also incorporates an orifice damping system, one that is unique to Works Performance. This damping system allows an extremely wide range of adjustments to the high-, medium- and low-speed circuits on compression and rebound. it has spring pre-load adjustment to change the ride height to accommodate changing loads. (Damping adjustment information is contained in an additional instruction sheet that comes with the Pro Racer series of shocks.) INSTALLATION 1. Place the motorcycle on the center stand. Remove the seat and the right side panel from the motorcycle. 2. Remove the lower shock mounting bolt first. A wedge may be needed under the rear tire to free the bolt. The swingarm will drop at this point. 3. Remove the top shock bolt and withdraw the shock towards the rear of the motorcycle. 4. Make sure that the two-piece bushings are in place in each of the eyelets of the Works Performance shock. NOTE: Do not try to install the shock with only one half of the bushing set, as this will lead to poor performance and premature seal leakage. For the same reasons, do not grind or file the inner or outer edges of the bushing to make them narrower. The amount of “float” in the bushing set is necessary to ensure smooth operation of the damper assembly. 5. The shock mounts with the reservoir towards the rear of the
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