Vintage and Classic Hondas › Honda Twins - for years of twins from 1960 - 1984

Spark plugs

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maltaman
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Spark plugs

maltaman
Hi I have a 1976 Honda cb 360. Don't ride it much. Engine runs great. The problem is that the spark plugs don't last. It usually sits for a few weeks and sometimes it's hard to start and then I find out that one of the spark plugs is bad. It does not matter which cylinder. Sometimes both spark plugs are bad. This only happen when I go to start it when it has been sitting for a few weeks, never had a spark plug that goes bad when I am riding. Engine runs great no oil burning no misfire. This is the 3 rd set of plugs in probably 100 miles. Anyone encountered this? Any Ideas????? Thanks
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TOOLS1
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Are you using NGK spark plugs? Those are the only spark plugs that work in Japanese motorcycles. Can you post some pictures of the spark plugs?
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)
maltaman
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Re: Spark plugs

maltaman
Found out the problem. Like I said I don't use the motorcycle much and when I do it is less than a 5 mile round trip. It sits all winter and use it maybe once a month or every other month in summer. Saying that, I figure that some soot on the spark plug would be normal since I am using the chock and going on short distances. What I did not expect is that when the bike sits the little soot on the tip of the spark plug is creating an insulation preventing the spark to jump to ground. I cleaned the spark plugs good with a wire brush and no more problem. Now I need to see if I can get some gap less spark plugs and see if they would work better.

Thanks
maltaman
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Re: Spark plugs

maltaman
And yes I am using NGK B8ES
TOOLS1
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TOOLS1
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Soot? You could be running a little rich. I would go to a B7ES plug, or better yet an Iridium plug.
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)
maltaman
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Re: Spark plugs

maltaman
What number Iridium plug will correspond with the NGK B7ES or B8ES?
TOOLS1
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Re: Spark plugs

TOOLS1
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The Part# should be 5044.
https://ngksparkplugs.com/en/part-finder
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)
maltaman
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Re: Spark plugs

maltaman
Thanks for the info.  I see that the 5044 is a replacement for the NGK B8ES.  If I want to use a hotter plug NGK B7ES what is the number in Iridium.

Thanks
TOOLS1
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Re: Spark plugs

TOOLS1
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BR7EIX Part#6664
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)
Re-run
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Re: Spark plugs

Re-run
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In reply to this post by maltaman
Denso plugs also work good in these old bike. Ngk is the standard now, but back in the day, denso was also a good choice.
1976-1975 HONDA CB360T 360 cc W24ES-U IW24 IW01-24 0.032  
                                                Standard      IR           IR racing      gap
The ride IS the adventure. The destination is just to get gas!
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