Yamaha - Reed valve ass'y - 6F6-13610-00-00Yamaha Reed Valve Assembly Air Intake & Fuel Control 6F6 13610 00 00 Overview On a two stroke Yamaha, how the engine breathes makes all the difference, and the reed valves are right at the center of that. Ive worked on motors that just wouldnt idle clean or had a hesitation coming off throttle, and worn reeds were the issue. Its not always the first thing people check, but when theyre not sealing right, youll feel it. Replace the assembly, and the