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Accel supercoil on 85 cb700sc

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SoCalMotoClassics

Accel supercoil on 85 cb700sc

Hello fellow riders,
Can anyone please advice if I can do a straight replacement of stock coils and wires with Accel 3 ohm Supercoil kit for 80's Honda bikes on my stock cb700sc? Not ready to undertake the GM HEI mod yet, but found I have an intermittent coil and a broken plug boot with a resistor inside. Is the resistor needed to protect the ignitor module or furnished for noise suppression? The kit is pricey, is it worth the expense? A YouTube video suggested the jumping spark inside broken boot took out my coil, and possibly the ignitor module, any truth to that from your experience?
Thanks in advance for your replies.

1973 CL350, 1975 CB750K, 1980 Yamaha DT175E . . . 30 yrs later . . . Picking up where I left off . . . Now riding a 1985 CB700SC Nighthawk S (Fair-weather rider by geography . . . sunny Southern California) . . . Ride to live . . . Live to ride!

TOOLS1

Re: Accel supercoil on 85 cb700sc

Administrator

The broken boot could have taken the coil out, hard to tell with these old parts why they quit. The Accel is a very good coil. I have used them and never had any problems. However you do not need the "HEI" swap, you just need the GM coil swap, which is what I would be doing. On the plug boots, get new NGK boots with the resistor. Most bike shops stock them, I even keep them on hand in my shop. Places like vintagecb750.com and Z1enterprises.com also sell them.
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)

SoCalMotoClassics

Re: Re: Accel supercoil on 85 cb700sc

As always, thanks Mr Tools1 for the sound advice. I'm going to swap out the OEM coils with AC Delco D555 ignition coils (2), make new plug wires with appropriate wire and new NGK resistor plug boots. If I understood correctly, I don't need to modify or change my ignitor module, and the coils will work properly with existing ignitor signals and irridium plugs. I assume I need to build some form of mounting for these. Do they require heat sinking or special bonding? I have yet to find a photo of this swap anywhere to give me an idea of what a proper swap looks like.

On 3/7/18, 8:34 PM "TOOLS1 [via Vintage and Classic Honda's]" <[hidden email]> wrote:

The broken boot could have taken the coil out, hard to tell with these old parts why they quit. The Accel is a very good coil. I have used them and never had any problems. However you do not need the "HEI" swap, you just need the GM coil swap, which is what I would be doing. On the plug boots, get new NGK boots with the resistor. Most bike shops stock them, I even keep them on hand in my shop. Places like vintagecb750.com and Z1enterprises.com also sell them.
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)

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TOOLS1

Re: Re: Accel supercoil on 85 cb700sc

Administrator

Here is a link to a write up on another forum about the GM coil swap. It should answer all your questions.
http://www.hondatwins.net/forums/64-electrical-discussion/17319-gm-distributorless-coil-mod-writeup.html
TOOLS