Yamaha Fuel Cock Assembly 1 7PB-F4500-00-00. Overview. The Yamaha Fuel Cock Assembly 1 7PB-F4500-00-00 is a genuine original equipment manufacturer component designed to control the flow of fuel from the tank to the engine. This assembly plays a critical role in regulating fuel delivery, allowing for safe shutoff and consistent fuel supply during operation.. Engineered to Yamaha's exact specifications, this component ensures a precise fit and reliable performance. It is an ideal replacement for