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Author Topic: 1973 CB500 Four Adjuster Clutch Not Moving  (Read 371 times)

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Offline Psychobilly

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1973 CB500 Four Adjuster Clutch Not Moving
« on: June 26, 2023, 05:44:55 PM »
The adjuster clutch would not move (yes I loosened the locking bolt). I removed the crankcase cover, disassembled and cleaned everything like new.

Applied fresh grease, and still does not turn at all.

I had to gently tap the adjuster clutch to remove and install into the crankcase cover, seem like a very tight fit.

Any ideas why this is happening?

Thank You
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Offline newday777

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Re: 1973 CB500 Four Adjuster Clutch Not Moving
« Reply #1 on: June 26, 2023, 06:34:44 PM »
Welcome to the forum Psychobilly  :o

The 'adjuster clutch' ???? Maybe as in clutch lifter adjuster on the sidecover or the adjuster on the clutch handle?
Can you be more specific?
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Stu
Honda Parts manager in the mid 1970s Nashua Honda
My current rides
1975 K5 Planet Blue my summer ride, it was a friend's bike I worked with at the Honda shop in 76, lots of fun to be on it again
1976 K6 Anteres Red rebuilding project, was originally my brother's that I set up from the crate, it'll breath again soon!
Project 750s, 2 K4, 2 K6, 1 K8
2008 GL1800 my daily ride and cross country runner

Prior bikes....
1972 Suzuki GT380 I had charge of it for a year in 1973 while my friend was deployed and learned to love street riding....
New CB450 K7 after my friend returned...
New CB750 K5 Planet Blue, demise by ex cousin in law at 9,000 miles...
New CB750 K6 Anteres Red, to replace the totaled K5, I sold this K6 at 45k in 1983, I had heavily modified it, many great memories on it and have missed it greatly.....
1983 GL1100A, 1999 GL1500 SE, 1999 GL1500A

Offline newday777

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Re: 1973 CB500 Four Adjuster Clutch Not Moving
« Reply #2 on: June 26, 2023, 06:39:44 PM »
Would give us some history of your bike and why and what you have done to it to this point?
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Stu
Honda Parts manager in the mid 1970s Nashua Honda
My current rides
1975 K5 Planet Blue my summer ride, it was a friend's bike I worked with at the Honda shop in 76, lots of fun to be on it again
1976 K6 Anteres Red rebuilding project, was originally my brother's that I set up from the crate, it'll breath again soon!
Project 750s, 2 K4, 2 K6, 1 K8
2008 GL1800 my daily ride and cross country runner

Prior bikes....
1972 Suzuki GT380 I had charge of it for a year in 1973 while my friend was deployed and learned to love street riding....
New CB450 K7 after my friend returned...
New CB750 K5 Planet Blue, demise by ex cousin in law at 9,000 miles...
New CB750 K6 Anteres Red, to replace the totaled K5, I sold this K6 at 45k in 1983, I had heavily modified it, many great memories on it and have missed it greatly.....
1983 GL1100A, 1999 GL1500 SE, 1999 GL1500A

Offline newday777

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Re: 1973 CB500 Four Adjuster Clutch Not Moving
« Reply #3 on: June 26, 2023, 06:54:48 PM »
Quote from: newday777 on June 26, 2023, 06:34:44 PM
Welcome to the forum Psychobilly  :o

The 'adjuster clutch' ???? Maybe as in clutch lifter adjuster on the sidecover or the adjuster on the clutch handle?
Can you be more specific?

OK I'm not real familiar with the CB500/550 clutch but here is the 'adjuster clutch ' #5 according to the parts fiche. Is this what you are referring to?
If so, we're you able to turn it with the cover off so no pressure was on the adjuster?
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Stu
Honda Parts manager in the mid 1970s Nashua Honda
My current rides
1975 K5 Planet Blue my summer ride, it was a friend's bike I worked with at the Honda shop in 76, lots of fun to be on it again
1976 K6 Anteres Red rebuilding project, was originally my brother's that I set up from the crate, it'll breath again soon!
Project 750s, 2 K4, 2 K6, 1 K8
2008 GL1800 my daily ride and cross country runner

Prior bikes....
1972 Suzuki GT380 I had charge of it for a year in 1973 while my friend was deployed and learned to love street riding....
New CB450 K7 after my friend returned...
New CB750 K5 Planet Blue, demise by ex cousin in law at 9,000 miles...
New CB750 K6 Anteres Red, to replace the totaled K5, I sold this K6 at 45k in 1983, I had heavily modified it, many great memories on it and have missed it greatly.....
1983 GL1100A, 1999 GL1500 SE, 1999 GL1500A

Offline Psychobilly

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Re: 1973 CB500 Four Adjuster Clutch Not Moving
« Reply #4 on: June 26, 2023, 07:10:52 PM »
Yes, it's #5 in the diagram.

It will not turn with the cover on or off. I currently have it off the bike (with the sled lifter #3 removed), it will not turn.

I've had the bike for about a year, riding it 3-5 times a week. Recently, I've had trouble finding neutral after 30-40 minutes of riding.

So I went to adjust it at the crank case and it would not move. So, I ended up taking it apart to clean and lubricate.

Also, I think the neutral issue is the clutch rod. It's broken.
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Offline newday777

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Re: 1973 CB500 Four Adjuster Clutch Not Moving
« Reply #5 on: June 26, 2023, 07:36:38 PM »
I did some research on the 500 clutch and my next question was going to be if the rod was in 1 piece or not. So you need to get another rod. They aren't available new from Honda but there are some used on ebay. The part number is 22850-323-000,  and apparently the cb450 and 500T use the same rod with a different number 22850-292-020

http://forums.sohc4.net/index.php?topic=99323.0

Did you get the adjuster out of the cover and get it apart to inspect it?
Do you have the Honda shop manual for your bike?
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Stu
Honda Parts manager in the mid 1970s Nashua Honda
My current rides
1975 K5 Planet Blue my summer ride, it was a friend's bike I worked with at the Honda shop in 76, lots of fun to be on it again
1976 K6 Anteres Red rebuilding project, was originally my brother's that I set up from the crate, it'll breath again soon!
Project 750s, 2 K4, 2 K6, 1 K8
2008 GL1800 my daily ride and cross country runner

Prior bikes....
1972 Suzuki GT380 I had charge of it for a year in 1973 while my friend was deployed and learned to love street riding....
New CB450 K7 after my friend returned...
New CB750 K5 Planet Blue, demise by ex cousin in law at 9,000 miles...
New CB750 K6 Anteres Red, to replace the totaled K5, I sold this K6 at 45k in 1983, I had heavily modified it, many great memories on it and have missed it greatly.....
1983 GL1100A, 1999 GL1500 SE, 1999 GL1500A

Offline newday777

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Re: 1973 CB500 Four Adjuster Clutch Not Moving
« Reply #6 on: June 26, 2023, 07:44:02 PM »
If you don't have the Honda shop manual you can download it here in the manuals section

http://manuals.sohc4.net/cb500/
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Stu
Honda Parts manager in the mid 1970s Nashua Honda
My current rides
1975 K5 Planet Blue my summer ride, it was a friend's bike I worked with at the Honda shop in 76, lots of fun to be on it again
1976 K6 Anteres Red rebuilding project, was originally my brother's that I set up from the crate, it'll breath again soon!
Project 750s, 2 K4, 2 K6, 1 K8
2008 GL1800 my daily ride and cross country runner

Prior bikes....
1972 Suzuki GT380 I had charge of it for a year in 1973 while my friend was deployed and learned to love street riding....
New CB450 K7 after my friend returned...
New CB750 K5 Planet Blue, demise by ex cousin in law at 9,000 miles...
New CB750 K6 Anteres Red, to replace the totaled K5, I sold this K6 at 45k in 1983, I had heavily modified it, many great memories on it and have missed it greatly.....
1983 GL1100A, 1999 GL1500 SE, 1999 GL1500A

Offline dave500

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Re: 1973 CB500 Four Adjuster Clutch Not Moving
« Reply #7 on: June 26, 2023, 10:51:22 PM »
its corroded in,youll have to knock it out carefully and free it up,ive seen exactly this before.
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Offline Deltarider

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Re: 1973 CB500 Four Adjuster Clutch Not Moving
« Reply #8 on: June 27, 2023, 01:01:37 AM »
Also mine needed some 'persuasion' to have it freed. That type of corrosion is the one yachtsmen are all to familiar with... Prior to assembly add just a hint of lube in the hole of the case.
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Offline Psychobilly

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Re: 1973 CB500 Four Adjuster Clutch Not Moving
« Reply #9 on: June 27, 2023, 04:34:57 AM »
I've already removed it and ran it though the parts washer like new. Applied fresh grease.

I guess I'll try using polishing compound to go a step further.
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Offline Andey108

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Re: 1973 CB500 Four Adjuster Clutch Not Moving
« Reply #10 on: June 27, 2023, 07:53:51 AM »
Yeah mine was abused, so only half the worm gear works.

It’s basically flipped upside now.

Turning part #5 is key to be able to make the rod disengage the clutch plates with the friction plates
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