If these are doing there job correctly, they will not allow the incursion of dust and grit into your swing-arm bearing, so if you are unsure, especially if you are re-building this area of your Honda, then renewal would be a sensible option? For all the parts you require for this area of your machine, take a look at the online catalogue or where applicable the online 'parts list' fiche. This service supports many of the classic Hondas this item is used on.
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