The forum moved from Simple Machines to Xenforo last year, which broke all the links. It really had to be done and Xenforo has been much better in a lot of ways, which is why advrider.com came here too.
BUT there is a way to find the information.
Use either the site search block (or Google with site:yamahasupertenere.com) and use as many keywords as possible. The search results are usually pretty narrowed down. So for example for an oil change in the rear drive from Google:
site:yamahasupertenere.com change final drive oil