okay so I have a 2004 400ex and was wanting to put a 406 (86mm) or a 416 (87mm). My stock bore is a 85mm and was wondering if I need to shave the cylinder sleeve for one of these to work.
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okay so I have a 2004 400ex and was wanting to put a 406 (86mm) or a 416 (87mm). My stock bore is a 85mm and was wondering if I need to shave the cylinder sleeve for one of these to work.