Author Topic: Engine teardown and inspection  (Read 13136 times)

Offline Trigger

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Re: Engine teardown and inspection
« Reply #105 on: November 27, 2020, 10:10:03 PM »
Always worth stripping a gear box down as, you never know what you will find  :o Looks like oil starvation but, not much heat. Expensive to find a good replacement  ::)

Offline cantarauk

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Re: Engine teardown and inspection
« Reply #106 on: November 27, 2020, 10:21:21 PM »
Is the shaft the same as the 550 ?

Offline Trigger

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Re: Engine teardown and inspection
« Reply #107 on: November 27, 2020, 11:30:24 PM »
Is the shaft the same as the 550 ?

Nope, 550 is 374 and the 500 is 323  ;)

Offline cantarauk

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Re: Engine teardown and inspection
« Reply #108 on: November 28, 2020, 10:42:26 AM »
Hi Oddjob,

Thank you for checking and getting back to me.

I was not aware of which way the lock and tab washers faced but after very close inspection from Triggers images I gather I had assembled incorrectly. Upon stripping down again I was still puzzled to why the second gear was stuck to shaft and difficult to remove so I made an effort to get this off and inspect further as you can read from above.

Will check the bag with all the clutch parts and also the photos I have when I stripped down and get back to you and thanks for the steer and advice.

Offline cantarauk

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Re: Engine teardown and inspection
« Reply #109 on: November 28, 2020, 11:00:05 AM »
Is the shaft the same as the 550 ?

Nope, 550 is 374 and the 500 is 323  ;)

Trigger can I ask if I find a good condition second hand one how would I tell the difference between a 500 and 550 as the images in the parts manuals look the same. I know I can't trust the manual so advice appreciated

Offline Trigger

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Re: Engine teardown and inspection
« Reply #110 on: November 28, 2020, 01:45:23 PM »
Is the shaft the same as the 550 ?

Nope, 550 is 374 and the 500 is 323  ;)

Trigger can I ask if I find a good condition second hand one how would I tell the difference between a 500 and 550 as the images in the parts manuals look the same. I know I can't trust the manual so advice appreciated


The 550 (374) has 3 groves in the shaft and the 500 (323) has 2 groves in the shaft. That is the easy way to visually identify them   ;)

Offline cantarauk

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Re: Engine teardown and inspection
« Reply #111 on: November 28, 2020, 05:28:01 PM »
Oddjob if you have on that would be great thank you

Tigger not sure I understand what you mean by grooves. Image below from shaft I removed from 500 (Had to do some dremel work to get the washer and 2/3rd gear out due to the damage) Are we talking the pink or blue in the image or am i way off.


Offline Trigger

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Re: Engine teardown and inspection
« Reply #112 on: November 28, 2020, 06:31:54 PM »
Yes they are the groves but, i think that i maybe  wrong about the groves >>> https://www.cmsnl.com/honda-cb500k2-four-1973-usa_model461/countershaft-trns_23220323000/#.X8KWhOlxepg

I only have 500 gearboxes in the workshop at the moment. I will have to go to the stores to find a 550 so, i can compare  :o

Offline cantarauk

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Re: Engine teardown and inspection
« Reply #113 on: December 01, 2020, 06:14:26 PM »
Thanks all for the help, advise and guidance. New 2nd gear and countershaft on its way so be working through all the info above to get this assembled again. Did not want to take the chance with the parts after what I found.

Offline cantarauk

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Re: Engine teardown and inspection
« Reply #114 on: December 09, 2020, 06:51:49 PM »
New (well) parts have arrived so can kick this off again






Offline cantarauk

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Re: Engine teardown and inspection
« Reply #115 on: December 09, 2020, 08:51:19 PM »
Just went to go and check and yes exactly the same moving but requires effort. Also some surface rust on the bearing but will clean that up

Offline cantarauk

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Re: Engine teardown and inspection
« Reply #116 on: December 10, 2020, 09:51:52 PM »
Been re-assembling the countershaft and when it comes to the thrust washer and the tab washer is there some special way you get these assembled ? I have put the thrust washer in first so it sits against the new replacement second gear and then the lock washer with the tabs facing the thrust washer. What I have now is a gap between the thrust and lock washer because of the lock washer tabs.

What am i doing wrong ?





« Last Edit: December 10, 2020, 10:31:07 PM by cantarauk »

Offline Bryanj

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Re: Engine teardown and inspection
« Reply #117 on: December 10, 2020, 10:19:12 PM »
Its a long time but i remember the tabs being only ever other groove and the thrust being the same so the tabs went into the thrust

Offline Trigger

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Re: Engine teardown and inspection
« Reply #118 on: December 10, 2020, 11:12:49 PM »
You have it correct but, push the first washer down and place the tab washer on top as, you have in your second picture. Then turn the first washer in the groove on the shaft and the tab washer will key in  ;)

With your first washer and the circlips you, must have these facing the correct way.

Offline cantarauk

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Re: Engine teardown and inspection
« Reply #119 on: December 11, 2020, 08:07:42 AM »
Thank both. Trigger what you said made sense and I checked with out the 2nd gear. Seems the gear I have been sent is the wrong part and is longer which is why the washer was not able to use the grove to rotate so the lock washer can drop in. Compared to the old damaged gear and it is noticeable.

New on the left





« Last Edit: December 11, 2020, 08:11:33 AM by cantarauk »

 

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