Yamaha - Gear, driven - 6H3-11537-01-00Yamaha Driven Gear Engine Timing Component 6H3 11537 01 00 Overview The Yamaha Driven Gear 6H3 11537 01 00 is one of those internal parts that keeps everything in sync inside the engine. When a gear like this starts to wear, it usually shows up as noise, rough running, or timing issues you cant quite pin down at first. It works behind the scenes to keep components moving together the way they should. If youre already inside the engine doing repairs,