Author Topic: 1975 CB550K Restoration  (Read 32785 times)

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Offline HondaAddict

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Re: 1975 CB550K Restoration
« Reply #25 on: November 26, 2015, 05:50:27 PM »
Finally got the #$@&% master cylinder apart. That snap ring tested my sanity for a couple hours.



« Last Edit: November 26, 2015, 05:52:31 PM by HondaAddict »
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Offline mrfish2

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Re: 1975 CB550K Restoration
« Reply #26 on: November 26, 2015, 07:08:08 PM »
Finally got the #$@&% master cylinder apart. That snap ring tested my sanity for a couple hours.

We've all been there, it might as well be the local hazing period  ;D ;D
1976 CB550K            1979 XS1100
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Offline HondaAddict

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Re: 1975 CB550K Restoration
« Reply #27 on: November 27, 2015, 03:46:13 PM »
We've all been there, it might as well be the local hazing period  ;D ;D

Lol. I figured I was too old and experienced for hazing, but I am new to the CB restoration club. Better than having my head shaved.  :)
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Offline HondaAddict

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Re: 1975 CB550K Restoration
« Reply #28 on: November 27, 2015, 04:23:08 PM »
Now for a much-needed petcock rebuild.



1976 Honda CB400F
1975 Honda CB550K (sold in 2020)  Project thread | Videos
2008 Honda GL1800AL
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Offline Stev-o

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Re: 1975 CB550K Restoration
« Reply #29 on: November 29, 2015, 12:56:07 PM »
Finally got the #$@&% master cylinder apart. That snap ring tested my sanity for a couple hours.


That why many of us dont bother with rebuilding them as DCC offers a nice aftermarket replacement at a very fair price...

https://www.davidsilverspares.com/CB550K3/part_123905/
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline HondaAddict

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Re: 1975 CB550K Restoration
« Reply #30 on: November 29, 2015, 06:42:46 PM »
That why many of us dont bother with rebuilding them as DCC offers a nice aftermarket replacement at a very fair price...

https://www.davidsilverspares.com/CB550K3/part_123905/

Thanks. I seriously considered buying another one, but I'm kinda stubborn and in no hurry. Plus, I'd like to salvage as many of the original parts as I can. Likely not much logic there.

Anyway, this one came out ok after some elbow grease. Unpainted is not orginal but I still like the look.


1976 Honda CB400F
1975 Honda CB550K (sold in 2020)  Project thread | Videos
2008 Honda GL1800AL
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Offline DWS

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Re: 1975 CB550K Restoration
« Reply #31 on: December 02, 2015, 07:40:28 PM »
Looks much better, great job.
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Offline HondaAddict

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Re: 1975 CB550K Restoration
« Reply #32 on: December 03, 2015, 08:42:49 PM »
Looks much better, great job.

Thanks! I'd be embarrassed to say how many hours it took to get that shine.
1976 Honda CB400F
1975 Honda CB550K (sold in 2020)  Project thread | Videos
2008 Honda GL1800AL
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1984 Honda V65 Sabre (sold in 2020) Project thread on V4Musclebike.com | Video
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Offline KennyRedman

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Re: 1975 CB550K Restoration
« Reply #33 on: December 04, 2015, 05:56:05 AM »
Anyway, this one came out ok after some elbow grease. Unpainted is not orginal but I still like the look.




Wow, that looks great! Is that a new cap? If so, where did you pick it up?

Offline HondaAddict

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Re: 1975 CB550K Restoration
« Reply #34 on: December 05, 2015, 03:53:50 AM »
Wow, that looks great! Is that a new cap? If so, where did you pick it up?

Thanks. That's the cap that came with it. I guess it held up so well because the bike was stored indoors for 34 years.
1976 Honda CB400F
1975 Honda CB550K (sold in 2020)  Project thread | Videos
2008 Honda GL1800AL
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Offline Zaipai

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Re: 1975 CB550K Restoration
« Reply #35 on: December 05, 2015, 04:51:04 PM »
Finally got the #$@&% master cylinder apart. That snap ring tested my sanity for a couple hours.


That why many of us dont bother with rebuilding them as DCC offers a nice aftermarket replacement at a very fair price...

https://www.davidsilverspares.com/CB550K3/part_123905/

Yea, 4into1.com has the same ones $20 cheaper..

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Its my Avatar..

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Offline HondaAddict

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Re: 1975 CB550K Restoration
« Reply #36 on: January 07, 2017, 07:52:42 AM »
As mentioned above, my 75 550K came to me with a 77/78 550K exhaust system. The pipes bolt on with no problems, but they interfere with the rear brake lever.





The 77/78 models have a different brake lever, like this:



This is mine:



It appears from photos I've seen that the splined brake shaft, footrest and all other pieces in this area the same on 75 and 77/78 models. I think....

Does anyone here know if a 77/78 brake lever would solve this problem? I'd like to be sure before I buy one.

Any advice is much appreciated. Cheers!
« Last Edit: January 07, 2017, 09:40:27 AM by HondaAddict »
1976 Honda CB400F
1975 Honda CB550K (sold in 2020)  Project thread | Videos
2008 Honda GL1800AL
2016 Honda CB500F
2018 Honda CB300F
1984 Honda V65 Sabre (sold in 2020) Project thread on V4Musclebike.com | Video
1986 Honda Z50R

Offline jonda500

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Re: 1975 CB550K Restoration
« Reply #37 on: January 07, 2017, 06:48:03 PM »
Not sure a 77/78 brake lever will solve it - the piece with the splines that the brake lever attaches to is longer on a 77/78 model (and the tube welded to the frame that it passes through is also longer), John
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1972 CB500K1 returned to complete/original condition
1975 CB550F built from parts - project thread:
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197? CB500/550 constructing from left over parts
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Offline HondaAddict

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Re: 1975 CB550K Restoration
« Reply #38 on: January 07, 2017, 06:52:38 PM »
Not sure a 77/78 brake lever will solve it - the piece with the splines that the brake lever attaches to is longer on a 77/78 model (and the tube welded to the frame that it passes through is also longer), John

Thanks John.

Perhaps I could get a 77/78 splined shaft and brake lever? I could make a spacer to put over the shaft and close the gap to my shorter frame tube.
1976 Honda CB400F
1975 Honda CB550K (sold in 2020)  Project thread | Videos
2008 Honda GL1800AL
2016 Honda CB500F
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1984 Honda V65 Sabre (sold in 2020) Project thread on V4Musclebike.com | Video
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Offline jonda500

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Re: 1975 CB550K Restoration
« Reply #39 on: January 07, 2017, 09:27:41 PM »
I reckon that definitely should work. Does the kickstarter also hit the pipes? John
Remember that an ignoramus is only someone who doesn't know something you just learned yesterday!

A starter clutch thread:
http://forums.sohc4.net/index.php/topic,122084.0.html
1972 CB500K1 original 4 owner bike
1972 CB500K1 returned to complete/original condition
1975 CB550F built from parts - project thread:
http://forums.sohc4.net/index.php/topic,149161.msg1711626.html#msg1711626
197? CB500/550 constructing from left over parts
1998 KTM 380 (two stroke) recent impulse buy, mmmm...

Offline HondaAddict

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Re: 1975 CB550K Restoration
« Reply #40 on: January 08, 2017, 04:27:50 PM »
No problems with the kickstarter, although it might cause trouble after I have a brake lever installed.



I'll try to find a shaft from a 77/78.
1976 Honda CB400F
1975 Honda CB550K (sold in 2020)  Project thread | Videos
2008 Honda GL1800AL
2016 Honda CB500F
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1984 Honda V65 Sabre (sold in 2020) Project thread on V4Musclebike.com | Video
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Offline HondaAddict

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Re: 1975 CB550K Restoration
« Reply #41 on: January 09, 2017, 03:14:12 PM »
Haha. The riser of the 77/78 kickstarter has a kink, while the 75 version is staight. I'll likely need to upgrade that as well. I wonder where this will end? ???
1976 Honda CB400F
1975 Honda CB550K (sold in 2020)  Project thread | Videos
2008 Honda GL1800AL
2016 Honda CB500F
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1984 Honda V65 Sabre (sold in 2020) Project thread on V4Musclebike.com | Video
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Offline jonda500

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Re: 1975 CB550K Restoration
« Reply #42 on: January 12, 2017, 02:54:51 PM »
Only one more thing I can see that might give you grief - the brake light switch hooks onto the back of the pivot piece on 77/78 models so the brake lever doesn't have the little tang to hook the switch actuator spring to, so I would also try and get the little brake switch holder bracket that goes under the top rear engine mount nut.
John
p.s. before upgrading the brake lever maybe see if your original one would work with the longer shaft?
Remember that an ignoramus is only someone who doesn't know something you just learned yesterday!

A starter clutch thread:
http://forums.sohc4.net/index.php/topic,122084.0.html
1972 CB500K1 original 4 owner bike
1972 CB500K1 returned to complete/original condition
1975 CB550F built from parts - project thread:
http://forums.sohc4.net/index.php/topic,149161.msg1711626.html#msg1711626
197? CB500/550 constructing from left over parts
1998 KTM 380 (two stroke) recent impulse buy, mmmm...

Offline HondaAddict

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Re: 1975 CB550K Restoration
« Reply #43 on: January 14, 2017, 10:58:20 AM »
Only one more thing I can see that might give you grief - the brake light switch hooks onto the back of the pivot piece on 77/78 models so the brake lever doesn't have the little tang to hook the switch actuator spring to, so I would also try and get the little brake switch holder bracket that goes under the top rear engine mount nut.
John

I noticed that. Been trying to figure out what I'm up against there. Since it'll be mostly out of sight, I was thinking I could fabricate one. But I'll look for one of the brackets if that won't do the trick.

Only one p.s. before upgrading the brake lever maybe see if your original one would work with the longer shaft?
I did check that - thanks. The straight shape of the 75 lever means it has to be moved almost 2 inches further out to clear the pipes, which I think would make it stick out too far. And of course, that would put the pedal 2 inches to the right (unless I can bend the lever, which comes with more challenges), which might make it easy to miss in an emergency stop.

I'm resigned to buying the 77/78 lever, shaft and spring. Not too much of a concern, if it will work. Then there's the possible kick starter problem, but I'll wait to see if mine works before tackling that. I think a 77/78 version would work.

Oh, and I have a problem with the side stand. It mounts several inches further toward the front on the 75/76 than it does on the 77/78. So, the stand hits the exhaust pipe before it folds up completely. I don't want to weld my frame because it still has the original paint, so I'm not sure what I'll do. I'm hoping I can find another stand that will somehow fit.

Thanks again, John!
« Last Edit: January 14, 2017, 12:58:38 PM by HondaAddict »
1976 Honda CB400F
1975 Honda CB550K (sold in 2020)  Project thread | Videos
2008 Honda GL1800AL
2016 Honda CB500F
2018 Honda CB300F
1984 Honda V65 Sabre (sold in 2020) Project thread on V4Musclebike.com | Video
1986 Honda Z50R

Offline HondaAddict

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Re: 1975 CB550K Restoration
« Reply #44 on: September 02, 2017, 04:09:42 AM »
I finally got back to this project. I bought a 77/78 brake lever and pivot shaft, which seem to work, but I'll need to make a spacer for the extra shaft length.



And I made a bracket to mount the brake light switch inside the frame.



I still need to come up with a brake lever torsion spring. Then I'll get a 77/78 kick starter and this little part of the job should be done.
« Last Edit: September 02, 2017, 04:12:42 AM by HondaAddict »
1976 Honda CB400F
1975 Honda CB550K (sold in 2020)  Project thread | Videos
2008 Honda GL1800AL
2016 Honda CB500F
2018 Honda CB300F
1984 Honda V65 Sabre (sold in 2020) Project thread on V4Musclebike.com | Video
1986 Honda Z50R

Offline HondaAddict

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Re: 1975 CB550K Restoration
« Reply #45 on: September 02, 2017, 04:27:58 AM »
I had a broken float pin tower on the #4 carb, so I found a good one on Ebay. It looked like this when it arrived.



The seller gave me a full refund. I think this was actually a lucky break, as I have a spare set of carbs. The carbs on the bike are 022A and the spares are 627B. From what I've read from searching here, the bodies are identical.

Assuming I swap the jets, emulsion tube, etc., can I put a 627B in a rack with three 022As? I could swap all 4 carbs, but the spares need quite a bit more work.
« Last Edit: September 02, 2017, 04:30:21 AM by HondaAddict »
1976 Honda CB400F
1975 Honda CB550K (sold in 2020)  Project thread | Videos
2008 Honda GL1800AL
2016 Honda CB500F
2018 Honda CB300F
1984 Honda V65 Sabre (sold in 2020) Project thread on V4Musclebike.com | Video
1986 Honda Z50R

Offline SOHC4 Cafe Racer Fan

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Re: 1975 CB550K Restoration
« Reply #46 on: September 02, 2017, 07:31:25 AM »
I like the tucked in brake switch bracket.
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Offline HondaAddict

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Re: 1975 CB550K Restoration
« Reply #47 on: September 08, 2017, 07:55:11 AM »
Front brake caliper bracket gets some TLC.





« Last Edit: September 08, 2017, 08:00:40 AM by HondaAddict »
1976 Honda CB400F
1975 Honda CB550K (sold in 2020)  Project thread | Videos
2008 Honda GL1800AL
2016 Honda CB500F
2018 Honda CB300F
1984 Honda V65 Sabre (sold in 2020) Project thread on V4Musclebike.com | Video
1986 Honda Z50R

Offline HondaAddict

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Re: 1975 CB550K Restoration
« Reply #48 on: September 08, 2017, 07:58:52 AM »
Left fork B/A.


Left fork (after) and right fork (before).
« Last Edit: September 08, 2017, 08:01:28 AM by HondaAddict »
1976 Honda CB400F
1975 Honda CB550K (sold in 2020)  Project thread | Videos
2008 Honda GL1800AL
2016 Honda CB500F
2018 Honda CB300F
1984 Honda V65 Sabre (sold in 2020) Project thread on V4Musclebike.com | Video
1986 Honda Z50R

Offline HondaAddict

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Re: 1975 CB550K Restoration
« Reply #49 on: September 08, 2017, 08:03:50 AM »
Front wheel.
1976 Honda CB400F
1975 Honda CB550K (sold in 2020)  Project thread | Videos
2008 Honda GL1800AL
2016 Honda CB500F
2018 Honda CB300F
1984 Honda V65 Sabre (sold in 2020) Project thread on V4Musclebike.com | Video
1986 Honda Z50R