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Author Topic: CB550 refurb  (Read 149450 times)

Offline Laverdaroo

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Re: CB550 refurb
« Reply #45 on: September 09, 2024, 03:31:36 PM »
I’ve never been so insulted

Can’t drink that, it needs more tea in it!


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Mornings are the invention of the devil!
1992 VFR750 FN (oldie but goldie) 'Betty'
1977 CB550F (current money pit!!) 'Mejima'
2002 VFR800 VTEC (The Beloved) 'Rose'
1977 CB400F (the last money pit!) 'Chewy'
1998 Ducati 748\853 conversion(sold :()
1980 ish CB750KZ in a billion bits (need to get rid, anybody want one?))

Offline Bryanj

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Re: CB550 refurb
« Reply #46 on: September 09, 2024, 04:48:23 PM »
Come on Roo you know you prefer Lady Gray Tea!
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Offline Laverdaroo

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Re: CB550 refurb
« Reply #47 on: September 10, 2024, 02:55:32 AM »
Stop giving all my secrets away Bryan!


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Mornings are the invention of the devil!
1992 VFR750 FN (oldie but goldie) 'Betty'
1977 CB550F (current money pit!!) 'Mejima'
2002 VFR800 VTEC (The Beloved) 'Rose'
1977 CB400F (the last money pit!) 'Chewy'
1998 Ducati 748\853 conversion(sold :()
1980 ish CB750KZ in a billion bits (need to get rid, anybody want one?))

Offline Johnny4428

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Re: CB550 refurb
« Reply #48 on: October 05, 2024, 02:51:09 PM »
What!! Evapourust is getting expensive, plus it is only the top that needs treatment. 😁
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1952 Cymoto on Triumph bicycle.
1961 Matchless G3
1974 Honda CB550K1
1978 Honda CB550K3
1999 ST1100 Pan European 50th Anniversary.
1975,1984,1986 Honda C90’s
1973 Honda CB750K3
1977 Honda CB550 (almost)

Offline Johnny4428

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Re: CB550 refurb
« Reply #49 on: October 07, 2024, 09:51:08 AM »
This does not look good! Further investigation required.


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1952 Cymoto on Triumph bicycle.
1961 Matchless G3
1974 Honda CB550K1
1978 Honda CB550K3
1999 ST1100 Pan European 50th Anniversary.
1975,1984,1986 Honda C90’s
1973 Honda CB750K3
1977 Honda CB550 (almost)

Offline taysidedragon

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Re: CB550 refurb
« Reply #50 on: October 07, 2024, 02:17:28 PM »
Uh oh! Looks like crack. 😩
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Gareth

1977 CB400F
1965 T100SS

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Re: CB550 refurb
« Reply #51 on: October 07, 2024, 02:47:55 PM »
Is there a corresponding mark on the other side?
Could it just be a gouge mark
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Honda CB400NA Superdream (current money puddle)
Honda CB500 K1 (second money pit)
https://www.sohc.co.uk/index.php/topic,28541.0.html
Honda CB400 four super sport (first money pit)
Link to my full restoration http://www.sohc.co.uk/index.php/topic,23291.0.html
This is a neat 500 restoration in the USA.
http://forums.sohc4.net/index.php/topic,151576.msg1731556.html#msg1731556

Offline Rozabikes Tim

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Re: CB550 refurb
« Reply #52 on: October 07, 2024, 02:56:21 PM »
Is it just me, I now see there is a crack or whatever but on looking at that initially I thought you were showing us the damage to a red wire???
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One day I'll have the time to restore it, not just talk and dream....

Offline Johnny4428

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Re: CB550 refurb
« Reply #53 on: October 07, 2024, 03:24:23 PM »
Quote from: Rozabikes Tim on October 07, 2024, 02:56:21 PM
Is it just me, I now see there is a crack or whatever but on looking at that initially I thought you were showing us the damage to a red wire???
Just the edge of the bike lift!😂
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1952 Cymoto on Triumph bicycle.
1961 Matchless G3
1974 Honda CB550K1
1978 Honda CB550K3
1999 ST1100 Pan European 50th Anniversary.
1975,1984,1986 Honda C90’s
1973 Honda CB750K3
1977 Honda CB550 (almost)

Offline Johnny4428

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Re: CB550 refurb
« Reply #54 on: October 07, 2024, 03:26:34 PM »
There is no mark or sign of a crack on the other side, so at the moment I’m thinking it’s just a gouge from maybe a trapped stone or something? But if I’m in any doubt I will look for a replacement.
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1952 Cymoto on Triumph bicycle.
1961 Matchless G3
1974 Honda CB550K1
1978 Honda CB550K3
1999 ST1100 Pan European 50th Anniversary.
1975,1984,1986 Honda C90’s
1973 Honda CB750K3
1977 Honda CB550 (almost)

Offline Laverdaroo

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Re: CB550 refurb
« Reply #55 on: October 07, 2024, 03:29:52 PM »
That looks a bit dodge to me, if it’s deep get it skimmed, I did but only cos I had loads of ‘meat’ left but I think I’d be changing that anyway Johnny.


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Mornings are the invention of the devil!
1992 VFR750 FN (oldie but goldie) 'Betty'
1977 CB550F (current money pit!!) 'Mejima'
2002 VFR800 VTEC (The Beloved) 'Rose'
1977 CB400F (the last money pit!) 'Chewy'
1998 Ducati 748\853 conversion(sold :()
1980 ish CB750KZ in a billion bits (need to get rid, anybody want one?))

Offline Johnny4428

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Re: CB550 refurb
« Reply #56 on: October 07, 2024, 06:04:02 PM »
You’re probably right Roo. Not deep, barely feel anything with the fingernail. I will investigate further before looking around for a replacement.
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1952 Cymoto on Triumph bicycle.
1961 Matchless G3
1974 Honda CB550K1
1978 Honda CB550K3
1999 ST1100 Pan European 50th Anniversary.
1975,1984,1986 Honda C90’s
1973 Honda CB750K3
1977 Honda CB550 (almost)

Offline Orcade-Ian

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Re: CB550 refurb
« Reply #57 on: October 07, 2024, 06:19:26 PM »
Can’t imagine it being a crack in that material Johnny, have you done a ‘ringing’ test?  Damage looks more like a wheel dragged out from under a pile of heavy stuff with something sharp under it.  I have a can of penetrant flaw detection dye if you want to be certain.
Ian
« Last Edit: October 07, 2024, 06:22:44 PM by Orcade-Ian »
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1953 BSA Golden Flash 650 - still a basket case
1960 Norton Model 50 Featherbed 350
1960 Ducati Elite 200 (nearing completion)
1972 Honda CB 350/4
1975 Honda CB 550/4 F1
1976 Honda CB 400/4 F1
2020 Honda C125 Super Cub
2026 Honda ADV 350

Offline Johnny4428

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Re: CB550 refurb
« Reply #58 on: October 07, 2024, 06:39:00 PM »
I did wonder about some sort of acoustic test will try that and see what the results are. Was going to clean it up and paint the centre but will have to be certain of its integrity before I spend any time on it.
Thanks for the offer of the flaw detecting magic gear Ian!
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1952 Cymoto on Triumph bicycle.
1961 Matchless G3
1974 Honda CB550K1
1978 Honda CB550K3
1999 ST1100 Pan European 50th Anniversary.
1975,1984,1986 Honda C90’s
1973 Honda CB750K3
1977 Honda CB550 (almost)

Offline K2-K6

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Re: CB550 refurb
« Reply #59 on: October 07, 2024, 06:57:31 PM »
I agree with Ian, unlikely in this material.

Looks to have been scraped by another object, then still used which has flattened any burr.

They are really, really tough material spec .... at the end of the world there'll be just cockroach and these old 70s Honda disc  :D

There's no tracking at either end of that mark either, not inboard into mount flange or outboard in evidence of how a crack would ordinarily propagate.
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