This is my 81 Yamaha XT500, notice the noise coming from the top-end mainly on the left side. I ended up doing the “grub screw repair” and have another video showing what it sounded like after the repair here: https://youtu.be/dvEglAbnmQY
website:https://www.jhmindustry.com/
Shanghai Jian & Mei Industry and Trade Co., Ltd. is the company which manufacture and export fasteners and metal hardware, founded in 2006, with import-export authority. Now, 80% products export to all over the world and 20% sell in domestic market.