No plug out one and get two.
Just pull out the bush. Take out the old bearing. Clean it and grease it. NNeedle bearing do not wear. The metal bush wear out.
Now put back the old bearing and push it to one side of the hole instead of putting it at centre, then put the new bearing at other side of hole.
BBasically in each arm of swingarm we have two bearing instead of one. So on each arm the bush is supported by two bearing at each end instead of one.
No mmodifications required just plug and play.
Once you open it you can get the idea.



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