I have a question, I just got my '81 yesterday (I'm as noob as it gets) and the guy I bougth it from broke 2 cables before selling it to me. I started swapping the cables yesterday, I haven't had time to adjust it yet. My question is, is there suppose to be another ball between the worm and the rod? I read in another thread http://www.xs650.com/forum/showthread.php?t=143 that there is a ball there but I haven't been able to find it in any diagram.