Yamaha - Injector, fixed - 7DH-R4138-01-00Yamaha Fixed Injector Fuel Delivery Component 7DH R4138 01 00 Overview Fuel injectors are one of those parts where you notice problems fastrough running, poor throttle response, or uneven performance. When a fixed injector isnt doing its job, the engine just wont feel right, especially under load. Ive seen engines smooth out immediately after replacing a worn or clogged injector. When its working properly, fuel delivery stays consistent and the motor