2010-2012 PRO-RIDE RUSH Switchback RMK Service Manual, Page 134Get this manual
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EngineCoolingExhaust Variable Exhaust System (VES)-Threaded Valve
SPRING BELLOWS
EV Cap Screws (A): 10.5-13.5 ft-lb (14.3-18.3 Nm) Apply Loctite 242TM to cylinder screwsCap Nut (B):