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Author Topic: Is that a crack?  (Read 1122 times)

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Offline piedy gonzales

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Is that a crack?
« on: March 01, 2015, 05:21:47 AM »
Dear people,

I'm restoring a cb550f.
I have stumbled upon something that seems to be a crack OR....
Is it normal?


Bike and focus on " crack "

Cheers
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Offline Stev-o

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Re: Is that a crack?
« Reply #1 on: March 01, 2015, 05:43:56 AM »
Are you asking about the frame?  I do not see a crack.
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Offline Johnie

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Re: Is that a crack?
« Reply #2 on: March 01, 2015, 05:54:45 AM »
He might be talking about the back of the lower case.
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Offline arogers88

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Re: Is that a crack?
« Reply #3 on: March 01, 2015, 05:56:57 AM »
I think he means the case on the back left side of the motor? Just above the oil pan.

Tough to tell with the pic... Why not pull the pan and see if it is cracked on the inside too?


Mine had JB weld slathered all over that exact corner on my 500. I pulled the pan and chipped it all off and everything looked fine. I think the PO just wanted to stop an oil leak.
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Offline strynboen

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Re: Is that a crack?
« Reply #4 on: March 01, 2015, 06:38:46 AM »
if there are a crack..it can easy be tig veldet..take the engine off..turn it upsidedovn..klean all oil off...and go to the velder..he like clean engines..and do not cot ,or do anything ..the velder,,like to do it his vay....after velding it must be machined flat....or atleast grindet to a perfekt fit..for the o ring sealing
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Offline DaveBarbier

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Re: Is that a crack?
« Reply #5 on: March 01, 2015, 06:41:50 AM »
I'll double check my '78 550 but I am 99% sure that's from casting. Not a crack and nothing to worry about.

If, in fact, you're talking about the case just above the oil pan seam.


---
1978 Honda CB550K
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Offline DaveBarbier

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Re: Is that a crack?
« Reply #6 on: March 01, 2015, 06:50:56 AM »
Yes, it's from casting on the 550. Mine has the exact same blemish. Nothing to worry about.





---
1978 Honda CB550K
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Offline PeWe

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Re: Is that a crack?
« Reply #7 on: March 01, 2015, 07:00:51 AM »
Look like a crack. Really bad casting? Look exact the same as the other known case.
« Last Edit: March 01, 2015, 07:02:46 AM by PeWe »
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Offline eigenvector

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Re: Is that a crack?
« Reply #8 on: March 01, 2015, 08:43:07 AM »
I had to look at mine because I couldn't believe that was a casting defect.  Yup, I have that same diagonal line.  Hidden under about 40 years worth of spooge of course.
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Offline LesterPiglet

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Re: Is that a crack?
« Reply #9 on: March 01, 2015, 09:38:38 AM »
Yip, same as mine. Normal.
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Offline FunJimmy

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Re: Is that a crack?
« Reply #10 on: March 01, 2015, 01:31:09 PM »
Ditto. Normal.
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Offline Bootsey

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Re: Is that a crack?
« Reply #11 on: March 01, 2015, 05:09:39 PM »
+1, normal, I had the same momentary scare with mine.
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Offline piedy gonzales

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Re: Is that a crack?
« Reply #12 on: March 02, 2015, 09:10:27 AM »
Aha, i was hoping for it to be a " bad " casting issue.
Thanks to all for the answers.

Cheers,
Pieter
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