Yamaha - Link Rod Kit Control Linkage Component 90891-40590-00. Overview. When your throttle or shift starts feeling off, a lot of times it traces back to linkage wear. I've swapped out plenty of rod kits where the engine was fine, but the control just wasn't responding clean anymore. The Yamaha Link Rod Kit 90891-40590-00 brings that connection back to tight, predictable movement. It's one of those behind-the-scenes parts that really changes how the boat feels at the helm.. Key Features. • Restores Control Precision - Helps bring back smooth and accurate throttle or shift response.. • Yamaha Matched Components - Designed to meet factory linkage geometry and fit.. • Improves Mechanical Connection - Reduces play and slack in the control system.. • Durable Marine Build - Holds up against vibration, corrosion, and repeated movement.. • Complete Kit Setup - Includes necessary components for proper linkage replacement.. Engine & Boat Compatibility. The Yamaha Link Rod Kit 90891-40590-00 is