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...well, it wouldn't surprise me ...though they ARE probably the original 16 year old bearings , so I'm surprised they're not square by now ! Unfortunately , it appears that they're an odd size so there were no Koyo / Yoko Ono cheap ones available - so genuine Honda ones have been ordered and it'll be next week before they arrive...AND the mechanic didn't advise me to go on any long rides until they've been replaced - so my NC500 Scottish Highlands Tour is cancelled ....(!)