Yamaha - Reed Valve Assembly Intake System Component 6E5-13610-00-00. Overview. If you've worked on two-stroke Yamahas, you know the reed valves are what keep the engine breathing right. This assembly controls how fuel and air move into the crankcase, and when it's not sealing properly, performance drops off fast. You'll usually notice it in rough idle, poor throttle response, or hard starting. A solid reed valve assembly brings that crisp, responsive feel back to the motor.. Key Features. Controlled Airflow Design - Regulates fuel and air intake for proper combustion timing.. Flexible Reed Petals - Opens and closes quickly to maintain efficient engine performance.. Durable Assembly Construction - Built to handle repeated cycling and engine vibration.. Direct Yamaha Replacement Fit - Installs cleanly with proper alignment to intake components.. Engine & Boat Compatibility. Compatible with a wide range of Yamaha two-stroke outboard engines utilizing reed valve intake systems. Commonly f