IM sure gray racer can tackle this one . but anyone please let me know .. I was putting on a new chain today . DID 520 gold X ring. and i think i cut it one link too short. didnt have the old chain to compare compare it to. a lot of bikes i see the axle is way towards the back of the adjustment almost as far back as it can go. some are middle of adjustment . mine is towards the front of the swingarm .. im sure the chain will stretch a little after a couple rides. but does an inch either forward or backwards make a difference . I have no idea what that manual says i dont have one. and i dont want to get a RTFM repost.