This link came up on the RZ/RD site and the stuff is so cool! We talked about their RZ heads recently, and now there's an adjustable rear suspension link that's making my wallet tingly.
https://www.covacharasintin.com/shop/en/yamaha/57-bieleta-regulable-rd-rz-350-250-ypvs-rd350.html (https://www.covacharasintin.com/shop/en/yamaha/57-bieleta-regulable-rd-rz-350-250-ypvs-rd350.html)