CB550 refurb

[Bryanj]

Yes but i think it just turned into a piece of tube without the flat and split, i had one from DS years ago with a new plenum

[Oddjob]

Mine had the one way valve when I bought a new plenum from DS, was some years ago though, tbh I don’t think I’d spotted it before till I saw a new one, the end gets covered in grease and crap and the last thing you feel like doing is squeezing that. TBH Bryan the one way valve is essentially just a split in a hose, closes up as soon as you release it.

[Johnny4428]

So if I just plug the plenum one and leave the air box ones open that should suffice?

[McCabe-Thiele (Ted)]

So if I just plug the plenum one and leave the air box ones open that should suffice?

Could you not  fit some cap ends on? A member here previously posted a link on blanking plugs that were on ebay in various sizes.

[Oddjob]

I’d fit the plenum tube but leave the air filter box alone.

[Johnny4428]

Thanks Ken, just ordered one from DS.

[Johnny4428]

On the sump front most annoyingly it is still weeping a little oil. Discovered after giving the engine a good heat as I was balancing the carbs. I have now a Honda rubber seal from DS which I will fit either to the sump pan that’s on the bike or the original one off the bike that requires a thread repair on the drain plug hole. I will try to compare sump gaskets once I have the sump removed, will see how the thread repair goes.

[Oddjob]

If you need a sump pan I’ve probably got one or 2 spare, even got one ceramic coated in satin black with the edges of the fins polished 😀😀😀 matches the oil filter housing I’ve also had done.

[Johnny4428]

Thanks Ken! I’ll see how I get on with the thread repair on mine. Like the idea of the blinded up pan and filter housing, barrels too? I’ve just gone for boring silver! 😳😂

[Johnny4428]

Repaired sump pan threads with a helicoil today, filled pan of water and will see if there’s any weeping overnight. This sump pan is in far better nick than the replacement I bought off eBay. Only changed because of the drain hole threads. Provided all is well I will clean up and paint and fit with new Honda sump pan gasket/rubber seal.



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[Johnny4428]

Cleaned and painted and new Honda gasket. Gave it a good run in the garage to heat up and all seems to be fine. Tried to compare the Honda gasket to the Vesrah but unfortunately it was oval shaped.



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[Oddjob]

Can I suggest an improvement Johnny.

The problem with helicoils isn't fitting them, it's removing the bolt after some time, sometimes the coil comes out with the bolt, meaning you have to do it again and each time makes the repair less and less reliable. This location however is ideal for never having to remove the sump bolt, just fit a Stahlbus sump plug, it means changing the oil requires no tools at all, less mess as the oil runs down a tube and in fact you can have the bowl located outside the engine instead of under it. You can in fact direct the tube into the opening of an old oil can so you can seal it afterwards, no more decanting old oil into a suitable container. You just remove the cap and plug and twist in the supplied hose, it's really simple, it's really reliable and I've had one fitted for many years now to my CB1300 and it's never leaked a drop. On engines where the exhausts are close to the sump plug it also means no more leaking onto them and the unpleasant cloud of noxious smoke when the engine starts and it starts burning off all that split oil.

Fit one, forget one and smile everytime you change the oil at how easy it now is. Make sure the thread size etc is correct, some kits for the CB500/550 are saying M14 but M&P reckon it's M12, M12 seems to be the right one IMO. Oh and no more buying sealing washers, you save money as time goes by.

https://www.ebay.co.uk/itm/263429840325?fits=UKM_Make%3AHonda&_skw=Stahlbus+Honda+CB500&itmmeta=01JMACE5WF6DYCX8BFJ4J9QZN1&hash=item3d55a45dc5:g:grgAAOSwe6ZaVnx~&itmprp=enc%3AAQAKAAAA0FkggFvd1GGDu0w3yXCmi1ft0di82H72c%2FtwcMjabnCygguykoezoeN9B63o1WPx%2Bu7JQ4xncJI%2Bjsh324B22zEB1kjSw9cKkKvNG0aRviC0ScGdlVM94jCV6UxRaKWn9fTc6WLRm1YlOosDeifDR10zp%2B3hco5DTT%2FG9ipVnZYrEERhZC385h0UAlfkbJQLmVM3tD5RRv5xddEE5DH%2FLWbT6pNxPCIT8nNUu7kYsEEcGTcWTXNuLNB5J3PyNTFqgnudSBqx9H1O%2FNGmyHdzNlg%3D%7Ctkp%3ABk9SR9LeuMyiZQ

I give this the Oddjob seal of approval 

Cheaper here.

https://www.ebay.co.uk/itm/263429840325?fits=UKM_Make%3AHonda&_skw=Stahlbus+Honda+CB500&itmmeta=01JMACE5WF6DYCX8BFJ4J9QZN1&hash=item3d55a45dc5:g:grgAAOSwe6ZaVnx~&itmprp=enc%3AAQAKAAAA0FkggFvd1GGDu0w3yXCmi1ft0di82H72c%2FtwcMjabnCygguykoezoeN9B63o1WPx%2Bu7JQ4xncJI%2Bjsh324B22zEB1kjSw9cKkKvNG0aRviC0ScGdlVM94jCV6UxRaKWn9fTc6WLRm1YlOosDeifDR10zp%2B3hco5DTT%2FG9ipVnZYrEERhZC385h0UAlfkbJQLmVM3tD5RRv5xddEE5DH%2FLWbT6pNxPCIT8nNUu7kYsEEcGTcWTXNuLNB5J3PyNTFqgnudSBqx9H1O%2FNGmyHdzNlg%3D%7Ctkp%3ABk9SR9LeuMyiZQ

[McCabe-Thiele (Ted)]

Great schematic video on the listing when you click on full item description.

[Oddjob]

Really? I can't see it Ted. Ahh got it now.

[Johnny4428]

I do like that drain plug idea, could drain directly into my waste oil drum. Definately will be getting one of them. As for the helicoil, I haven’t had one done before on a drain plug so can’t comment on the longevity. Good candidate for Stahlbus!