Further - You guys who think Yamaha gives a ShT about these old bikes are mistaken. They do Not ! A different seal is often used as they do Not want to make a seal and just substitute one that will work. Also I have tracked OEM prices for years and Yamaha often ( usually ) lowers the price on NLA items as they do not want anyone else to go into reproducing these items. Yamaha holds any and all info about parts MUCH closer than the other Japanese companies even though they will not do those parts again. It's all about selling New bikes and Not about keeping what's sold going. If they have an old part it's because the same is now on a new bike. Yamaha also assigns a new number when a part is used again and usually will not give a superceed number or a detailed size or description - Some parts have up to 60 different numbers for the same item. Don't expect to reuse Old Seals, Gaskets or O-rings and no one who Knows would.