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The R&D Kawasaki Ultra 250X Blowoff Valve Pressure Adjustor Kit is just what the doctor ordered for keeping the Ultra 250X’s boost pressure properly adjusted for peak performance. The O.E.M. Kawasaki blowoff valves pressure has an O.E.M. specification setting of 10 P.S.I. After the recommended break-in period has been performed or after 10-20 hours, if poor performance and low peak RPM’s are noticed, use the R&D Blowoff Valve Pressure Adjustor Kit to check and properly adjust the valves blowoff pressure. Some O.E.M. valve settings blowoff prematurely, leaking off and robbing valuable horsepower with low 6-8 P.S.I. settings. The R&D Kit is a necessary tool kit to readjust the blowoff valves pressure settings when using R&D Booster Wheel Pulley Kits. The R&D Blowoff Valve Pressure Adjustor Kit has helped many top dealers service departments reset the O.E.M. valve system to O.E.M. valve specifications to keep the Ultra 250X performing properly.