Author Topic: CB750 Speedo and Tacho disassembly  (Read 15015 times)

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Offline Kentg

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CB750 Speedo and Tacho disassembly
« on: November 15, 2009, 07:32:08 pm »
The Honda speedo and tachos are sealed together with a soft metal band. For the purpose of rebuilding the instrument(face renewal) this band needs to be removed. Is there a specific tool to do this, can one be made for removal and replacement??
Kentg

Hinomaru

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Re: CB750 Speedo and Tacho disassembly
« Reply #1 on: November 15, 2009, 09:14:05 pm »

Offline BeSeeingYou

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Re: CB750 Speedo and Tacho disassembly
« Reply #2 on: November 15, 2009, 09:17:49 pm »
There is a thread on this here somewhere but the short answer is yes.  Go to a hardware store, Home Despot, etc and get a paint can opener and use it to pry up the crimped down part of the ring.  Do a search for the thread if you want more info.

Offline Hannibal Smith

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Re: CB750 Speedo and Tacho disassembly
« Reply #3 on: November 15, 2009, 10:40:38 pm »
Some pry, some cut.

The best method IMO is to carefully pry the ring until the assembly separates- but ONLY if the housing/bracket that you are running can camoflauge the chongered backside of the ring. No matter how carefully you press or tweak it, there will be telltale signs of the prying.

Cutting is another method, but most will then epoxy (JB Weld, Hysol etc.) the union upon rebuilding.

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Offline BeSeeingYou

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Re: CB750 Speedo and Tacho disassembly
« Reply #4 on: November 15, 2009, 10:54:10 pm »
Some pry, some cut.

The best method IMO is to carefully pry the ring until the assembly separates- but ONLY if the housing/bracket that you are running can camoflauge the chongered backside of the ring. No matter how carefully you press or tweak it, there will be telltale signs of the prying.

Cutting is another method, but most will then epoxy (JB Weld, Hysol etc.) the union upon rebuilding.



I did this on gauges for my XS650 and they have a rubber ring that snaps over the metal the ring and covers it up as they do get "chongered" up in the process. ;D  On the Xs650 website some where using a narrow band of 4 inch heat shrink to hid the ring.
« Last Edit: November 15, 2009, 10:57:04 pm by srust58 »

Offline westondc

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Re: CB750 Speedo and Tacho disassembly
« Reply #5 on: November 15, 2009, 10:56:49 pm »
B.O.X.N.I.F.E. Hospital fund https://www.everribbon.com/ribbon/view/8352
Rider no. 115 on the 2012 SOHC/4 Honda World Tour
Rider no. 274 on the 2011 SOHC/4 Honda World Tour
1972 Honda CB500k1
1971 Honda CB350k3
the project http://forums.sohc4.net/index.php?topic=64499.0
Trip/Project Blog http://easterntowestern.blogspot.com/
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just be a vagabond, living out of a backpack on a little Honda, cruisin all over the damn place....
"As your attorney, I advise you to buy a motorcycle. How else can we cover a thing like this righteously?"

Offline dangerdavison

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Re: CB750 Speedo and Tacho disassembly
« Reply #6 on: December 22, 2009, 09:22:28 pm »
here is how i did mine.
'76 CB750K

Offline dangerdavison

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Re: CB750 Speedo and Tacho disassembly
« Reply #7 on: December 22, 2009, 09:26:49 pm »
And the needle. If you're planning on keeping the original face put something down to protect it from the pliers.
'76 CB750K

Offline Johnie

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Re: CB750 Speedo and Tacho disassembly
« Reply #8 on: December 23, 2009, 06:07:50 am »
I pop the needle off with a couple spoons and just roll it off. Then repaint the tip.
« Last Edit: December 23, 2009, 07:00:24 am by Johnie »
1970 CB750K0 - Candy Ruby Red
1973 CB750K3 - Candy Bacchus Olive or Sunflake Orange
1970 Chevy Chevelle SS396 - Cortez Silver
1976 GL1000 sulphur yellow (current project)

Oshkosh, WI  USA

Offline westondc

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Re: CB750 Speedo and Tacho disassembly
« Reply #9 on: December 23, 2009, 06:44:29 am »
i found a fork works really well when removing the needle. slide the prongs of the fork around the tach/speedo needle and rest the bottom side of the fork on top of the screw heads for leverage. be carefull not to break the needle off! maybe a squirt of WD-40 would be a good idea.
B.O.X.N.I.F.E. Hospital fund https://www.everribbon.com/ribbon/view/8352
Rider no. 115 on the 2012 SOHC/4 Honda World Tour
Rider no. 274 on the 2011 SOHC/4 Honda World Tour
1972 Honda CB500k1
1971 Honda CB350k3
the project http://forums.sohc4.net/index.php?topic=64499.0
Trip/Project Blog http://easterntowestern.blogspot.com/
Quote
just be a vagabond, living out of a backpack on a little Honda, cruisin all over the damn place....
"As your attorney, I advise you to buy a motorcycle. How else can we cover a thing like this righteously?"

Offline CB750faces.com (Lecram)

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Re: CB750 Speedo and Tacho disassembly
« Reply #10 on: December 23, 2009, 07:53:04 am »
I used WD40.
Then I heated the needle with a hairdryer and lifted the needle with two teaspoons. And it worked



Offline westondc

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Re: CB750 Speedo and Tacho disassembly
« Reply #11 on: December 23, 2009, 10:00:33 am »
I used WD40.
Then I heated the needle with a hairdryer and lifted the needle with two teaspoons. And it worked

good idea heating it up with the hairdryer, might have saved me from a broken speedo needle :-\
B.O.X.N.I.F.E. Hospital fund https://www.everribbon.com/ribbon/view/8352
Rider no. 115 on the 2012 SOHC/4 Honda World Tour
Rider no. 274 on the 2011 SOHC/4 Honda World Tour
1972 Honda CB500k1
1971 Honda CB350k3
the project http://forums.sohc4.net/index.php?topic=64499.0
Trip/Project Blog http://easterntowestern.blogspot.com/
Quote
just be a vagabond, living out of a backpack on a little Honda, cruisin all over the damn place....
"As your attorney, I advise you to buy a motorcycle. How else can we cover a thing like this righteously?"

Offline Johnie

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Re: CB750 Speedo and Tacho disassembly
« Reply #12 on: December 23, 2009, 10:29:18 am »
I used WD40.
Then I heated the needle with a hairdryer and lifted the needle with two teaspoons. And it worked

good idea heating it up with the hairdryer, might have saved me from a broken speedo needle :-\

Yah, when I take my wife's hair dryer into my shop I get a evil look from her.  ;D
1970 CB750K0 - Candy Ruby Red
1973 CB750K3 - Candy Bacchus Olive or Sunflake Orange
1970 Chevy Chevelle SS396 - Cortez Silver
1976 GL1000 sulphur yellow (current project)

Oshkosh, WI  USA