I was cleaning my bike and noticed that the last bolt (the one used as a reference to measure the chain tension) from the chain slider does not bolt into the swingarm properly, as the hole on the swingarm seems to be worn. The bolt simply goes in and out without even screwing in/out. I have tried to use different bolts on it but the same happens and if I try to use a slightly larger bolt it does not fit (obvious). What should I do? Suggestions? Thanks.