Vintage and Classic Hondas

Accelerator pump issue ?

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bebauer
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Accelerator pump issue ?

bebauer
I have a 1982 CB750c.

My bike starts and idles fine, but for some reason cylinder 2 doesn't fire.( Cylinder 2 is connected to the carburetor that has the accelerator pump)

I have good spark across all 4 cylinders but cylinder 2 doesn't fire.

It's obvious that the cylinder is not getting fuel because the spark plug is clean and the exhaust pipe is cold.

Would the accelerator pump be causing this ?

TOOLS1
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Re: Accelerator pump issue ?

TOOLS1
Administrator
Nope, would not have a thing to do with it. Your pilot jet is probably plugged.
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)
bebauer
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Re: Accelerator pump issue ?

bebauer
I cleaned the pilot jet and now all four cylinders fired, but it doesn't seem like it's getting same amount of fuel as the other cylinders.

I don't have the automatic fuel petcock hooked up. Is this something that is necessary to have hooked up ?
TOOLS1
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Re: Accelerator pump issue ?

TOOLS1
Administrator
No it's not. What makes you think that cylinder is not getting as much fuel as the others?
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)
bebauer
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RE: Accelerator pump issue ?

bebauer
When I run the bike and then shut it off the exhaust pipe is significantly cooler then the rest, which makes me think its not getting consistent fuel.  But I don't have a lot of experience working on bikes so it could be something else.
 
-------- Original Message --------
Subject: Re: Accelerator pump issue ?
From: "TOOLS1 [via Honda CB750'S]"
<[hidden email]>
Date: Sat, October 04, 2014 11:19 am
To: bebauer <[hidden email]>

No it's not. What makes you think that cylinder is not getting as much fuel as the others?
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.

1976 CB 750-A X 2
1977 CB 750-A X 2
1977 CB 750-K X 2
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)


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icerigger
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Re: Accelerator pump issue ?

icerigger
In reply to this post by bebauer
Perhaps the carbs need to be sync'd?
Livin' my life like a song.

1985 Honda Rebel 250 - "Birdie"
1979 CB750K - "Behemoth"
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