Yamaha - Reed valve assy - 69L-13610-00-00Yamaha Reed Valve Assembly Intake Air Control System 69L 13610 00 00 Overview On a two stroke Yamaha, the reed valve assembly is what keeps the engine breathing the way it should. When its sealing tight and moving freely, you get smooth idle, quick starts, and solid throttle response. But once those reeds start wearing or not closing clean, the motor loses that crisp feel and can get unpredictable. Its one of those components you dont see often, but