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Author Topic: first time stumped...first build...cb750k8 rear drum arm?..  (Read 1121 times)

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Offline gtacb750

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first time stumped...first build...cb750k8 rear drum arm?..
« on: December 20, 2015, 03:16:04 PM »
Hi...new to the forum..i would appreciate any help
I am restoring a cb750k8...have it all disassembled except the arm that attaches to the rear drum brake. There is a bolt that goes through it and a nut at the back but no space to use a wrench or socket...
Doesnt seem like there are many with this issue from what ive searched...
Ive attached a pic...but not sure if im doing it right lol

Thanks
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Offline goldarrow

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Re: first time stumped...first build...cb750k8 rear drum arm?..
« Reply #1 on: December 20, 2015, 03:47:38 PM »
Remove the nut and Just hammer it out
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Offline gtacb750

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Re: first time stumped...first build...cb750k8 rear drum arm?..
« Reply #2 on: December 20, 2015, 03:49:36 PM »
Shouldve mentioned this...bolt spins with the nut...and cant get a hold of the bolt...
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Offline Restoration Fan

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Re: first time stumped...first build...cb750k8 rear drum arm?..
« Reply #3 on: December 20, 2015, 04:03:59 PM »
Put a pair of vice grips on the bolt to lock it into place and have someone hold the vice grips.  That should keep the bolt from spinning so that you can get the nut off.
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Ron

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Offline gtacb750

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Re: first time stumped...first build...cb750k8 rear drum arm?..
« Reply #4 on: December 20, 2015, 04:40:29 PM »
Thx ill give it a try..time to bug the neighbor lol
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Offline Flyin900

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Re: first time stumped...first build...cb750k8 rear drum arm?..
« Reply #5 on: December 20, 2015, 05:09:45 PM »
Wrong or damaged bolt in there. It should be an oblong bolt head that locks into the shape of the indent in the arm. It then is self locking and won't spin on you.
Can't tell from your picture if the original bolt is in there and rounded off or the incorrect bolt.
The correct bolt has a flush head like what I see in there, so a PO may have damaged the shape so it will no longer lock up properly.
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Common sense.....isn't so common!

1966 CL77 - 305cc - Gentleman's Scrambler
1967 CL175K0 - Scrambler #802 engine
1972 CB350F - Candy Bacchus Olive - Super Sport
1973 CB350F - Flake Matador Red - Super Sport
1975 CB400F - Parakeet Yellow - Super Sport
1976 CB400F - Varnish Blue - Super Sport
1976 GL1000 - Goldwing Standard
1978 CB550K - Super Sport
1981 GL1100 - Goldwing Standard
1982 CM450A - Hondamatic
1982 CB900C - Custom
1983 CX650E - Eurosport
1983 CB1000C - Custom X 2 Bikes now - both restored
1983 CB1100F - Super Sport - Pristine example
1984 GL1200 - Goldwing Standard

Offline gtacb750

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Re: first time stumped...first build...cb750k8 rear drum arm?..
« Reply #6 on: December 20, 2015, 06:46:58 PM »
How important is it that it shouldnt rotate? Should this be replaced?

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Offline 754

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Re: first time stumped...first build...cb750k8 rear drum arm?..
« Reply #7 on: December 20, 2015, 07:09:22 PM »
With the right bolt in there, you can re and re it from the outside..effortlessly..
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Offline Flyin900

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Re: first time stumped...first build...cb750k8 rear drum arm?..
« Reply #8 on: December 20, 2015, 08:18:54 PM »
Definitely shouldn't rotate, so yes to a replacement is needed and Honda may still offer a replacement piece, or a member here may have one available.
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Common sense.....isn't so common!

1966 CL77 - 305cc - Gentleman's Scrambler
1967 CL175K0 - Scrambler #802 engine
1972 CB350F - Candy Bacchus Olive - Super Sport
1973 CB350F - Flake Matador Red - Super Sport
1975 CB400F - Parakeet Yellow - Super Sport
1976 CB400F - Varnish Blue - Super Sport
1976 GL1000 - Goldwing Standard
1978 CB550K - Super Sport
1981 GL1100 - Goldwing Standard
1982 CM450A - Hondamatic
1982 CB900C - Custom
1983 CX650E - Eurosport
1983 CB1000C - Custom X 2 Bikes now - both restored
1983 CB1100F - Super Sport - Pristine example
1984 GL1200 - Goldwing Standard

Offline gtacb750

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Re: first time stumped...first build...cb750k8 rear drum arm?..
« Reply #9 on: December 20, 2015, 08:29:17 PM »
Quote from: 754 on December 20, 2015, 07:09:22 PM
With the right bolt in there, you can re and re it from the outside..effortlessly..

Do you mind clarifying what you mean?
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Offline gtacb750

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Re: first time stumped...first build...cb750k8 rear drum arm?..
« Reply #10 on: December 20, 2015, 08:29:34 PM »
Quote from: Flyin900 on December 20, 2015, 08:18:54 PM
Definitely shouldn't rotate, so yes to a replacement is needed and Honda may still offer a replacement piece, or a member here may have one available.

I think i understand what it does now...thx for the suggestion ill call honda tmr...hopefully they have it in stock or can order it..
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