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Author Topic: Doms CB550F1 project  (Read 24053 times)

Offline Trigger

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Re: Doms CB550F1 project
« Reply #270 on: September 12, 2023, 10:45:26 AM »
I have had loads of rods that needed re claiming, which you can not see that they are out with the human eye over the years and quite a few twisted rods even on SOHC's.

As for the price of the correct measuring equipment it can be very expensive and take a lot of experience to use correctly.  ;) 
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Offline McCabe-Thiele (Ted)

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Re: Doms CB550F1 project
« Reply #271 on: September 12, 2023, 12:31:21 PM »
Not sure what is meant by reclaiming a con rod Graham?
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Honda CB500 K1 (new pit dug out ready)
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Link to my full restoration http://www.sohc.co.uk/index.php/topic,23291.0.html

Offline Trigger

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Re: Doms CB550F1 project
« Reply #272 on: September 12, 2023, 02:25:20 PM »
Quote from: McCabe-Thiele (Ted) on September 12, 2023, 12:31:21 PM
Not sure what is meant by reclaiming a con rod Graham?

I think the yanks call it resizing but, i have always known it as reclaiming. I use a Sunnen machine  ;)
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Offline Bryanj

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Re: Doms CB550F1 project
« Reply #273 on: September 12, 2023, 03:01:16 PM »
Ted, normal a rod goes oval with the dimension across thr bolts staying standard and other way from rod o cap getting a bit bigger so you carefully take a small amount off the pads with bolt holes in then hone the hole circular again
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Offline McCabe-Thiele (Ted)

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Re: Doms CB550F1 project
« Reply #274 on: September 12, 2023, 04:19:15 PM »
That sounds an amazing process - presumably you can still fit an off the shelf bearing shell, I guess were talking a really small amount of metal removal.
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Honda CB500 K1 (new pit dug out ready)
Honda CB400 four super sport (first money pit)
Link to my full restoration http://www.sohc.co.uk/index.php/topic,23291.0.html

Offline Trigger

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Re: Doms CB550F1 project
« Reply #275 on: September 12, 2023, 06:17:29 PM »
Yes, back to standard spec. And you have to do all the rods the same to keep the weight right  ;)
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Online Seabeowner

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Re: Doms CB550F1 project
« Reply #276 on: September 12, 2023, 06:47:20 PM »
Plastigage is cheap. But if you measure out of spec with the clearances and if you can't rely on the crank being as new then you have to buy (or borrow) a pair of new shells to do the measuring with.
« Last Edit: September 13, 2023, 07:18:07 AM by Seabeowner »
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1971  CB500K0  Candy Jade Green or Candy Gold
1973  CB500K1  Candy Ruby Red
1975  CB550F1   Shiny Orange
1978  CB550K     Excel Black

Offline DomP

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Re: Doms CB550F1 project
« Reply #277 on: September 16, 2023, 03:48:46 PM »
I've spent the morning plastigauging my crank, the results are very consistent. I won't bore you with every journal but they are to my eye identical across the entire crank, an enjoyable process!
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1975 XS650B
1976 CB550F1 current project
2012 Triumph Daytona 675

Offline Bryanj

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Re: Doms CB550F1 project
« Reply #278 on: September 16, 2023, 04:54:00 PM »
Cant remember spec, is that within?
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Offline DomP

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Re: Doms CB550F1 project
« Reply #279 on: September 16, 2023, 05:04:16 PM »
Quote from: Bryanj on September 16, 2023, 04:54:00 PM
Cant remember spec, is that within?

Haynes says 0.02 to 0.048

My readings were when torqued to the lower end of the range
« Last Edit: September 16, 2023, 05:06:18 PM by DomP »
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1975 XS650B
1976 CB550F1 current project
2012 Triumph Daytona 675

Offline Bryanj

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Re: Doms CB550F1 project
« Reply #280 on: September 16, 2023, 05:15:49 PM »
Clearance is fine then
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Offline DomP

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Re: Doms CB550F1 project
« Reply #281 on: September 16, 2023, 06:06:20 PM »
Quote from: Bryanj on September 16, 2023, 05:15:49 PM
Clearance is fine then

Thats a relief 🤪
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1975 XS650B
1976 CB550F1 current project
2012 Triumph Daytona 675

Offline DomP

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Re: Doms CB550F1 project
« Reply #282 on: September 17, 2023, 07:57:37 PM »
Im putting together a DS order for gasket set, primary drive rubbers etc, I'm sure I've read any removed circlips must be replaced with new ones, one looks a Honda specific part but are the rest easily and cheaper to source from Ebay etc?
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1975 XS650B
1976 CB550F1 current project
2012 Triumph Daytona 675

Offline Oddjob

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Re: Doms CB550F1 project
« Reply #283 on: September 17, 2023, 09:04:36 PM »
Not the gearbox ones, use Honda. The rest should be ok.
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Offline DomP

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Re: Doms CB550F1 project
« Reply #284 on: September 17, 2023, 09:31:28 PM »
Do you mean I can reuse the ones under the clutch cover Ken?
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1975 XS650B
1976 CB550F1 current project
2012 Triumph Daytona 675
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