Yamaha - Throttle Body Assembly Air Intake Control 6CJ-13750-01-00. Overview. Throttle response is one of the first things you notice when running a Yamaha, and this assembly plays a big part in that. When everything is working right, the engine responds clean and steady from idle to full throttle. I've worked on motors that hesitated or surged, and it usually traced back to the throttle body. Swap in a solid assembly, and you get that smooth, predictable control back on the water.. Key Features. • Controlled Air Intake Flow - Regulates airflow into the engine for smooth and consistent throttle response.• Responsive Throttle Operation - Helps eliminate hesitation and delivers steady acceleration.• Durable Internal Construction - Built to handle constant movement, vibration, and engine conditions.• Balanced Airflow Performance - Supports proper air and fuel mixture for efficient combustion.• Factory-Spec Fitment - Designed to integrate seamlessly with Yamaha intake systems.. Engine & Bo