SOHC.co.uk Forums > CB500/550
CB550 refurb
Laverdaroo:
I had exactly the same issue with an after market one Jonny but managed to find a good replacement but took two goes to get it right. Same thing, front and back.
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Laverda Dave:
I know it's not needed now you've fixed the problem but Simply Bearings can supply O-Ring chord in various lengths, thickness, colours and choice of material including viton.
Link here:
https://simplybearings.co.uk/shop/Seals-O-Ring-Cord/c19_4549/index.html?selection=VITON+Rubber+O-Ring+Cord
Oddjob:
Not keen on the idea of cord, always a chance it will leak at the join. You can easily measure the existing oring and see if they make one that size. If not you can get some specially made but you need to order 500 as a rule. They’d be cheaper than buying genuine though.
Johnny4428:
--- Quote from: Laverdaroo on February 07, 2025, 05:15:30 PM ---I had exactly the same issue with an after market one Jonny but managed to find a good replacement but took two goes to get it right. Same thing, front and back.
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--- End quote ---
That’s interesting Roo. I think the ring was thinner at the ends of the sump pan it seemed to just sink right into the groove, unless the groove in the pan was deeper at the ends? More investigation required. If I can get the drain hole threads repaired on the original I will fit it back on at first oil change. It’s in better shape than the replacement I put on. Might purchase an original seal from DS.
Laverdaroo:
Same as that Jonny, it appeared thin in the same areas, just as you describe. I shouldn’t thin it’s the pan although I did pass mine over an engineer’s plate just to check. Better than just firing the parts cannon at it
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