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]

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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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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[DomP]

Just a thought, would flatting the sump on some wet n dry to take a bit of material off it be an idea, if all o rings seem to be thinner  then reducing the o ring rebate a touch would solve it.  Non reversible move however.

[Oddjob]

Cheaper and much easier to just buy a genuine oring Dom. I must measure a genuine sump ring and see what dimensions it is, might be available off the shelf from somewhere. I could do with an old one to cut so I can measure it’s length then measure the diameter of a new unused genuine ring to get that figure. Of course I had a few lying around and threw them away when I was cleaning up my collection of sump pans 😯😯

[DomP]

I thought it might be a bit extreme😄

[Johnny4428]

Just ordered one from DS. £15 odd delivered. Better than a weepy sump!

[Johnny4428]

Since I had converted to a 500 air filter but retained the 550 air box I have two outlets and one inlet that has nothing attached to them at the moment. Just wondered what would be the best to do with them and indeed what other people have done. There is a condensate drain point on the air filter box and the same on the air plenum. And an inlet on the side of the air filter box for the now defunct carbon capture recycle idea from the breather hose. I was wondering if there was a problem fitting a short bit of hose and connecting the two condensate drains. Has anybody actually had any condensate with the breather bypassed to just vent to atmosphere? I am uncertain and slightly confused what to do. I don’t have any hoses for these, I had a knackered hose from one of these, but nothing reordered till I find out what I need.


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[DomP]

Interested to know too, Ken suggested to me to do as you have because I was missing so much of the 550 air filter internals.

[Johnny4428]

Don’t want to be sucking unfiltered air such as up through the plenum drain, maybe just needs capped?

[Bryanj]

I think the original 500 plenum drain was flattened at the end with a slit in it so you could squeeze it open to drain water out

[Johnny4428]

I just checked on CMS and still available Bryan.

[Oddjob]

The plenum drain hose has a one way return valve fitted at the bottom, to empty the hose you squeeze the tube and it lets out any water collected. Saying that, it’s something I’ve never done, they just don’t seem to collect any, or maybe it evaporates during the summer months. As for the hole in the bottom of the air filter box, just leave it, it’s not doing anything and it may help get a little more air into the box if anything obstructs the air duct.

500 filters last longer than 550 ones due to less contamination caused by the recycling system, what a waste of time and money that was, all because of California and it’s anti smog measures.