Just looking at that burton bike bits bush, it’s a split bush like the swing arm bushes on my oif. Interestingly for those the
manual does state do not resize the bush (swingarm) however when they come sized that the inner section won’t fit when the bush has been fitted then what can you do. So I placed an expanding reamer through mine. Worked it out in small increments and kept cleaning and trying the centre piece till it was spot on.
The defining factor though between these two systems is the bushes are less than an inch apart on the swing arm. Not the case on the crank casing and the crank setup is subject to more wear and other issues than the swingarm.
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