Yamaha - Reed valve asy - 688-13610-00-00Yamaha Reed Valve Assembly Air Intake Component 688 13610 00 00 Overview Reed valves are one of those parts that make a big difference in how a two stroke Yamaha feels on the water. When theyre worn or not sealing right, youll notice it fastloss of power, rough running, and poor throttle response. This assembly helps keep airflow moving the way it should, giving the engine that crisp, responsive feel you expect. Its a solid fix when performance starts