Yamaha - Body, throttle 1 - 67H-13751-00-00Yamaha Body, Throttle 1 Air Intake Component 67H 13751 00 00 Overview When throttle response starts feeling off or inconsistent, the throttle body is usually where I start looking. This part controls how air enters the engine, and if its worn or sticking, youll notice hesitation or uneven acceleration. Ive worked on plenty of Yamahas where cleaning only goes so far and replacement is the real fix. When its working right, throttle response feels smooth