Vintage and Classic Hondas

rear shock mounting bolt broken.

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clintwillis
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rear shock mounting bolt broken.

clintwillis
One of my rear shock mounting bolts is broken ... I am at work or would attach a picture.  I can do that later.

Any recommendations on replacing the broken threaded bolt that is welded into the frame on the rear?

1979 CB750K
TOOLS1
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Re: rear shock mounting bolt broken.

TOOLS1
Administrator
Grind the weld to remove the old one. Then find one on an old frame, and grind it off. Then weld it to your frame. If you need one let me know as I have several old frames in the scrap pile.
TOOLS
Life is not about the number of breaths, you take, but the moments that take your breath away.
I don't have an anger problem. I have an idiot problem. Hank Hill
Never confuse education for intelligence.
Happiness is a belt fed weapon.
I just can't imagine what could go wrong.
No fire? No explosions? So whats the point of your story?
Those who are too smart to engage in politics are punished by being governed by those who are dumber. ~Plato
It couldn't be done, but the darn fool didn't know it, and did it anyway.
We all got problems. Ksharp
I like vintage bikes because they take me away from the clutter of technology that I work with everyday and back to a simpler time of mechanical elegance and simplicity.. "ninadm"
Darkwing Duck: The worst part of public transportation is the Public.
"That is awesome shit there" Re-Run
"Fear nothing, attack everything" Eric Berry
" Oh, you read that on the internet? Clearly it IS a massive problem. Of course it CAN’t be normal operation."

1976 CB 750-A X 2
1977 CB 750-A X 4
1977 CB 750-K
1976 CB 750 F
1981 CB 750
1966 Kawasaki SG 250
1981 KZ 750 LTD
1973 CB 350
1979 CM 185 Twinstar
1982 Honda XL 80
South of Eden (Kansas City MO)
Lucky 1
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Re: rear shock mounting bolt broken.

Lucky 1
In reply to this post by clintwillis
Go buy a metric grade #8 bolt that will be long enough to go through the frame.
Cut the head off of the bolt.
Then make sure the threaded part is trimmed to size and the smooth part of it is long enough.

Cut the old one off of the frame and then drill out the part that is in the frame.
Put the new stud/bolt all the way through the frame and weld both sides.
TIG welding is best.
On a Roadstar Adventure.
Piute
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Re: rear shock mounting bolt broken.

Piute
Lucky 1 wrote
Go buy a metric grade #8 bolt that will be long enough to go through the frame.
Cut the head off of the bolt.
Then make sure the threaded part is trimmed to size and the smooth part of it is long enough.

Cut the old one off of the frame and then drill out the part that is in the frame.
Put the new stud/bolt all the way through the frame and weld both sides.
TIG welding is best.

                                                 
                            1977 CB750 F2 Super Sport
<LET THOSE WHO RIDE DECIDE><RIDE TO LIVE-LIVE FOR JESUS> 
Native American from central Cal,  Kickstand UP in S.W.Missouri,
                                       
 
shultz_1978
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Re: rear shock mounting bolt broken.

shultz_1978
In reply to this post by clintwillis
If you go with the gr.8 bolt metric bolt. Use a grade 10.9 As on metric the grade 8.8 is like a grade 5 and the 10.9 is like a grade 8.  If you do take that route get a bolt that has some smoth shank. You can cut it so that your shock mounts on the smoth part. then cut off the other end leaving you as much threads as you need. Do not use metric socket heads as some are a grade 12.9 and are hardened. Like a alloy steel they may crystalize from the heat of welding.

I would go with a original mounting bolt.

Good luck
Simple if some one else can, why can't I
Jamie
Lucky 1
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Re: rear shock mounting bolt broken.

Lucky 1
I have not seen those grades in the USA.
On a Roadstar Adventure.
shultz_1978
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Re: rear shock mounting bolt broken.

shultz_1978
That is what I do a living sell fasteners cutting tools and abrasives. Metric bolts do not go by gr.5 or gr.8
Simple if some one else can, why can't I
Jamie
shinyribs
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Re: rear shock mounting bolt broken.

shinyribs
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Shultz! Thanks for that info! Great to know this kind of stuff
clintwillis
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Re: rear shock mounting bolt broken.

clintwillis
seems to be many different ways to do it huh.

seems drilling and replacing threaded end would be easiest ... just gotta make sure to get it as true as possible
1979 CB750K
rich
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Re: rear shock mounting bolt broken.

rich
In reply to this post by TOOLS1
I just broke one too. Tools, can you fix it if I bring it over?
89 VN 750A - Given to son-in-law
79 CB 750K-sold 3 May 21
78 CB 750K
77 CB 750K
77 GL 1000 x 2
77 CB 550F
Holton, KS, US
TOOLS1
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Re: rear shock mounting bolt broken.

TOOLS1
Administrator
Should not be a problem. Bring it over.
TOOLS
Life is not about the number of breaths, you take, but the moments that take your breath away.
I don't have an anger problem. I have an idiot problem. Hank Hill
Never confuse education for intelligence.
Happiness is a belt fed weapon.
I just can't imagine what could go wrong.
No fire? No explosions? So whats the point of your story?
Those who are too smart to engage in politics are punished by being governed by those who are dumber. ~Plato
It couldn't be done, but the darn fool didn't know it, and did it anyway.
We all got problems. Ksharp
I like vintage bikes because they take me away from the clutter of technology that I work with everyday and back to a simpler time of mechanical elegance and simplicity.. "ninadm"
Darkwing Duck: The worst part of public transportation is the Public.
"That is awesome shit there" Re-Run
"Fear nothing, attack everything" Eric Berry
" Oh, you read that on the internet? Clearly it IS a massive problem. Of course it CAN’t be normal operation."

1976 CB 750-A X 2
1977 CB 750-A X 4
1977 CB 750-K
1976 CB 750 F
1981 CB 750
1966 Kawasaki SG 250
1981 KZ 750 LTD
1973 CB 350
1979 CM 185 Twinstar
1982 Honda XL 80
South of Eden (Kansas City MO)
rich
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Re: rear shock mounting bolt broken.

rich

Cool. I already broke a dozen drill bits on it. One broke off inside, can't drill through it.

89 VN 750A - Given to son-in-law
79 CB 750K-sold 3 May 21
78 CB 750K
77 CB 750K
77 GL 1000 x 2
77 CB 550F
Holton, KS, US
TOOLS1
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Re: rear shock mounting bolt broken.

TOOLS1
Administrator
No problem. Just let me know when you can bring it over. Which bike is it on?
TOOLS
Life is not about the number of breaths, you take, but the moments that take your breath away.
I don't have an anger problem. I have an idiot problem. Hank Hill
Never confuse education for intelligence.
Happiness is a belt fed weapon.
I just can't imagine what could go wrong.
No fire? No explosions? So whats the point of your story?
Those who are too smart to engage in politics are punished by being governed by those who are dumber. ~Plato
It couldn't be done, but the darn fool didn't know it, and did it anyway.
We all got problems. Ksharp
I like vintage bikes because they take me away from the clutter of technology that I work with everyday and back to a simpler time of mechanical elegance and simplicity.. "ninadm"
Darkwing Duck: The worst part of public transportation is the Public.
"That is awesome shit there" Re-Run
"Fear nothing, attack everything" Eric Berry
" Oh, you read that on the internet? Clearly it IS a massive problem. Of course it CAN’t be normal operation."

1976 CB 750-A X 2
1977 CB 750-A X 4
1977 CB 750-K
1976 CB 750 F
1981 CB 750
1966 Kawasaki SG 250
1981 KZ 750 LTD
1973 CB 350
1979 CM 185 Twinstar
1982 Honda XL 80
South of Eden (Kansas City MO)
rich
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Re: rear shock mounting bolt broken.

rich

The 78k.

89 VN 750A - Given to son-in-law
79 CB 750K-sold 3 May 21
78 CB 750K
77 CB 750K
77 GL 1000 x 2
77 CB 550F
Holton, KS, US
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