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Author Topic: Can of worms?  (Read 2013 times)

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hardschool

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Can of worms?
« on: March 28, 2009, 06:12:28 PM »
 Hello all, just started a tear down on my 550K and she is not lookin all that happy. Not sure if I need to to a full rebuild, or if finding another motor is going to be the more cost effective way to go.
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Offline scunny

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Re: Can of worms?
« Reply #1 on: March 28, 2009, 06:16:54 PM »
buying a going engine is cheaper, if that engine has no issues.
pull your motor apart and have a good look at everything then decide
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hardschool

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Re: Can of worms?
« Reply #2 on: March 28, 2009, 06:19:18 PM »
 Rusted up valve springs
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hardschool

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Re: Can of worms?
« Reply #3 on: March 28, 2009, 06:20:34 PM »
 This was fun getting off, almost rusted solid
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hardschool

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Re: Can of worms?
« Reply #4 on: March 28, 2009, 06:22:39 PM »
 Not too sure about the rods either, looks like surface rust. Mabey just a shotpeening to clean and strengthen?
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hardschool

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Re: Can of worms?
« Reply #5 on: March 28, 2009, 06:25:27 PM »
 There is the progress as of now, I am new to SOHC4 motors and not really sure how to get the case open. But I am pretty sure it is straight forward
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Offline martino1972

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Re: Can of worms?
« Reply #6 on: March 28, 2009, 08:28:19 PM »
your starting out good...lot's of pictures....we love pictures here.... :P :P :P :P :P :P :P

the rust seems worse then it is.....the rods will clean up nicely,that one cylinder you might have to see if it pitted the cylinder wall from the rust,but a quick honing might make things alot brighter.....
but even then,an over bore will solve that,no problem.......but it will add $$$$ to the rebuild of course....
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Marti, I want you to know, I like you an awful lot, but guys have said far less and left wearing their drinks on their shirts.
http://forums.sohc4.net/index.php?topic=36933.0  (my bobber)

Offline KB02

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Re: Can of worms?
« Reply #7 on: March 29, 2009, 05:35:45 AM »
I've seen worse (see my avatar).



I don't like the look of your cam, though.
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Offline Toxic

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Re: Can of worms?
« Reply #8 on: March 29, 2009, 06:11:33 AM »
How many miles on that engine?

It doesn't look like a low miles engine judging by the wear on the cam.


the cam is the bigger issue.
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hardschool

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Re: Can of worms?
« Reply #9 on: March 29, 2009, 07:57:52 AM »
she only has about 46 thousand miles on her, I will get a better picture of the cam for all to see.
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hardschool

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Re: Can of worms?
« Reply #10 on: March 29, 2009, 08:34:06 AM »
Here is the cam in head
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hardschool

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Re: Can of worms?
« Reply #11 on: March 29, 2009, 08:35:30 AM »
 And two shots out of the head. (sorry about the flash reflection)
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hardschool

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Re: Can of worms?
« Reply #12 on: March 29, 2009, 08:36:41 AM »
not sure how well the wear is showing up
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Offline HavocTurbo

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Re: Can of worms?
« Reply #13 on: March 29, 2009, 01:44:34 PM »
Get a micrometer out or a caliper and check if theres any deformation in the lobes.

Check them all. If they are all about the same thickness from top to bottom then the cam isnt so bad. But may still need to be replaced.

If all that checks out, then check for deformation "around" the tip of the lobes. Grooves, wear valleys, etc.

46K? that's not half bad for a 550. Especially one in this condition. Too bad the PO didn't take good storage precautions before you picked it up.

Just my $0.02
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'48 HD Panhead - Exxon Valdez
'78 CB550K - Fokker CB.3
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'80 Yamaha XS850G - Kanibalistik
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hardschool

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Re: Can of worms?
« Reply #14 on: March 29, 2009, 02:24:00 PM »
 Yea the PO was my dad, he bought it new in 1975 then I got a hold of it, pissed him off and I think he took it out on the bike. Oh well, live and learn.
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hardschool

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Re: Can of worms?
« Reply #15 on: March 29, 2009, 04:42:02 PM »
 Lazy Sunday, this is all I have gotten done today. I used a house of colors candy base, kinda dig it
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hardschool

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Re: Can of worms?
« Reply #16 on: March 29, 2009, 04:51:50 PM »
Goin to enjoy the rest of the day with the family, nice enough for a cruise around the once or 20 times ;D
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