Yamaha - Shift Control Lever Throttle & Shift Linkage 6H4-44173-00-00. Overview. When shifting starts to feel sloppy or inconsistent, this lever is often part of the problem. It's a high-use component that takes a lot of wear every time you move in and out of gear. I've replaced these on motors where the control just didn't feel right anymore, and it tightens things up immediately. It's a small fix that brings back that solid, dependable Yamaha shift feel.. Key Features. Direct Shift Connection