Strangely enough, my chain tensioner on that side is really stiff, to the extent that I managed to round off the head of the bolt! The annoying thing is its not seized up! It was stiff when I stripped down my swing arm last year but took it out and lubed it up and thought it would be okay. I wonder if anyone else has had this problem, it just seems as if the thread is wrong!
By the way, does anyone know where I can get a good quality stainless replacement for mine?