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Author Topic: My stupidity may have destroyed my 76 cb550k  (Read 1817 times)

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Offline brohemoth

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My stupidity may have destroyed my 76 cb550k
« on: August 21, 2013, 04:36:45 AM »
I just had to replace the sprocket oil seal when it was completely fine and not leaking oil whatsoever. And being a first timer, I was a bit malicious with my removal, and may or may not have damaged the bearings behind the seals. Once I gingerly "placed" the bearings back in their place, I replaced the seal and hoped to act as if nothing ever happened.

Flash forward to the tank still being off, but the bike is oiled up and chain in place. The rear tire spins freely, but then abruptly stops.

My next plan of action is to get the tank back on, fire it up and see how it acts.

How stupid am I? How difficult would it be to replace these bearings.


I believe they're # 72 on this microfiche.

http://www.partzilla.com/parts/search/Honda/Motorcycle/1976/CB550K%20A/TRANSMISSION%20%2B%20KICK%20STARTER%20SPINDLE/parts.html

Part number 91002-283-003 , I think.

Be gentle, thanks for whatever help I can get.

Cheers
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Offline Xnavylfr

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Re: My stupidity may have destroyed my 76 cb550k
« Reply #1 on: August 21, 2013, 06:39:26 AM »
Check the complete drive CHAIN and make sure nothing has jammed it !! I would find out WHY it locked BEFORE starting and putting the bike in gear!!!
I think (not positive) those bearings are pressed on the shafts,which requires splitting the cases and removing  that shaft assembly. If you start it and put it in gear ,you could RUIN a perfectly good tranny.


Xnavylfr(CHUCK)
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Black 750K8

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Re: My stupidity may have destroyed my 76 cb550k
« Reply #2 on: August 21, 2013, 07:05:05 AM »
Oh yes if it won't turn by hand just use the motor it is a lot strong and it will break free what ever is stopping it great idea ::) "How stupid am I?" I think you know the answer to that better than anyone.
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Offline brohemoth

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Re: My stupidity may have destroyed my 76 cb550k
« Reply #3 on: August 21, 2013, 07:21:19 AM »
Quote from: Xnavylfr on August 21, 2013, 06:39:26 AM
Check the complete drive CHAIN and make sure nothing has jammed it !! I would find out WHY it locked BEFORE starting and putting the bike in gear!!!
I think (not positive) those bearings are pressed on the shafts,which requires splitting the cases and removing  that shaft assembly. If you start it and put it in gear ,you could RUIN a perfectly good tranny.


Xnavylfr(CHUCK)


Thanks for the info. I'll take a stab at it this evening. Is there anyway I can verify if the bearings are pressed?
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Offline MoMo

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Re: My stupidity may have destroyed my 76 cb550k
« Reply #4 on: August 21, 2013, 07:31:04 AM »
part 72 should not come out without splitting the cases, the half moon retaining clip above it is supposed to prevent the bearing from moving...Larry
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Black 750K8

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Re: My stupidity may have destroyed my 76 cb550k
« Reply #5 on: August 21, 2013, 07:33:21 AM »
There are a lot of guys here that have had these motors apart I'm sure one will get back with you for now stop until you are sure. Take the rear chain off to see if the motor will turn over. Take the spark plugs out and use your hands to push the kick start slowly This will tell you if it is the motor or something in the rear end. Take out the battery before something bad happens.
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Offline Bankerdanny

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Re: My stupidity may have destroyed my 76 cb550k
« Reply #6 on: August 21, 2013, 08:29:42 AM »
This will not be helpful now, but in the future when something like this happens TAKE PICTURES.

It is much easier to give advice when we can see exactly what you are talking about.
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Offline vames

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Re: My stupidity may have destroyed my 76 cb550k
« Reply #7 on: August 21, 2013, 08:44:05 AM »
Quote from: brohemoth on August 21, 2013, 04:36:45 AM
I just had to replace the sprocket oil seal when it was completely fine and not leaking oil whatsoever.

Eek. Just remember, if nothing is broken, it's time to wash the bike, not "fix" it.
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Offline brohemoth

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Re: My stupidity may have destroyed my 76 cb550k
« Reply #8 on: August 21, 2013, 08:59:39 AM »
Quote from: vames on August 21, 2013, 08:44:05 AM
Quote from: brohemoth on August 21, 2013, 04:36:45 AM
I just had to replace the sprocket oil seal when it was completely fine and not leaking oil whatsoever.

Eek. Just remember, if nothing is broken, it's time to wash the bike, not "fix" it.

Hindsight....to be fair, I convinced myself "it was a learning experience" when I first started to attack the seal. I read about a seal I needed to replace on this forum, and it was suggested "oh while you're down there might as well fix this one." So that was my mentality. And that's why I'm where I'm at now. Lesson learned. I promise.
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Offline Xnavylfr

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Re: My stupidity may have destroyed my 76 cb550k
« Reply #9 on: August 21, 2013, 09:31:59 AM »
IF IT'S NOT BROKE , DON'T FIX IT!!!!!



Xnavylfr(CHUCK)
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Offline iron_worker

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Re: My stupidity may have destroyed my 76 cb550k
« Reply #10 on: August 21, 2013, 10:32:29 AM »
That bearing should definitely not come out. It's held in place by 2 half moon snap rings that should be seated in a matching groove in the case. The only way it should come out is if the case is split ... unless of course someone split your cases before and didn't remember to put the snap ring back in.

I would recommend you remove your chain, put the bike in neutral, and feel how the final drive turns by hand. If you still feel where it jamming up then it's likely a problem in the bearing. If the final drive is smoothe then your problem may just be in a sticky chain jamming things up.

Definitely do NOT start it up to try and break it free. That's almost guaranteed to break something.

Even if you do find that it is only a stick chain ... I would be wondering why those snap rings are missing and I would not trust the final drive seal to hold in your secondary shaft/bearing!

IW
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Offline brohemoth

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Re: My stupidity may have destroyed my 76 cb550k
« Reply #11 on: August 21, 2013, 11:45:19 AM »
Quote from: iron_worker on August 21, 2013, 10:32:29 AM
That bearing should definitely not come out. It's held in place by 2 half moon snap rings that should be seated in a matching groove in the case. The only way it should come out is if the case is split ... unless of course someone split your cases before and didn't remember to put the snap ring back in.

I would recommend you remove your chain, put the bike in neutral, and feel how the final drive turns by hand. If you still feel where it jamming up then it's likely a problem in the bearing. If the final drive is smoothe then your problem may just be in a sticky chain jamming things up.

Definitely do NOT start it up to try and break it free. That's almost guaranteed to break something.

Even if you do find that it is only a stick chain ... I would be wondering why those snap rings are missing and I would not trust the final drive seal to hold in your secondary shaft/bearing!

IW

Thank you for the guidance. It definitely did not feel right before I put the sprocket/chain on. I'll take a deep breath, swallow my pride, and take it to a mechanic. Again, thanks for the words. Cheers.
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Offline Schnell

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Re: My stupidity may have destroyed my 76 cb550k
« Reply #12 on: August 21, 2013, 12:42:57 PM »
Quote from: vames on August 21, 2013, 08:44:05 AM
Quote from: brohemoth on August 21, 2013, 04:36:45 AM
I just had to replace the sprocket oil seal when it was completely fine and not leaking oil whatsoever.

Eek. Just remember, if nothing is broken, it's time to wash the bike, not "fix" it.

Better yet, if nothing is broken, it's time to ride!
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Offline Duanob

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Re: My stupidity may have destroyed my 76 cb550k
« Reply #13 on: August 21, 2013, 01:54:55 PM »
replacing aging seals, gaskets and o-rings is not fixing things, its maintaining things. Which I prefer to do. As IronWorker said this bearing should not have just popped out. Either the clips rusted away, fell out, or were forgotten about the last time someone was in there. It could've been a disaster.

Its nice to find the problem now while its on the stand at your house instead of miles away from home or doing 60MPH on the hiway.  Now its a matter of fixing the problem.
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Offline goldarrow

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Re: My stupidity may have destroyed my 76 cb550k
« Reply #14 on: August 21, 2013, 02:05:58 PM »
well, now may be a time to "might as well do _____ while you're down there."   on the positive side, this should keep you busy for up coming winter and let you know your bike.  by the time you're done with it, you will have a good, brand new functioning motor. 
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Offline brohemoth

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Re: My stupidity may have destroyed my 76 cb550k
« Reply #15 on: August 22, 2013, 08:30:54 AM »
Appreciate all the words, friends. I'm trying awfully hard not to be wildly discouraged by this. Just gotta look at it as a long term winter project, and hopefully she'll be in even better shape by the spring.  Thanks everyone. I'm certain I'll be back.
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Online RAFster122s

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Re: My stupidity may have destroyed my 76 cb550k
« Reply #16 on: August 22, 2013, 02:23:53 PM »
It would be wise to try and diagnose it yourself if you are inclined to learn about your bike. With guidance and a good manual and schematics from parts diagrams you will learn more and gain confidence.
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Offline Don R

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Re: My stupidity may have destroyed my 76 cb550k
« Reply #17 on: August 22, 2013, 09:22:51 PM »
What part of the world are you located in? Sometimes a brother may ride over and have a look.
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Offline brohemoth

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Re: My stupidity may have destroyed my 76 cb550k
« Reply #18 on: August 23, 2013, 02:17:13 PM »
Quote from: Don R on August 22, 2013, 09:22:51 PM
What part of the world are you located in? Sometimes a brother may ride over and have a look.

Southern New Hampshire. That would be a godsend, if at all possible. I'm just looking at this as a really valuable learning process. It'll force me to take my time and do everything properly over the winter. This WILL kick ass next year.
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