New coils, without ballast resistor ?


Information and questions on GL1000 Goldwings (1975-1979)
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spleenatis
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Joined: Sun Oct 11, 2020 4:29 am
Location: France
Motorcycle: 1979 GL1000

New coils, without ballast resistor ?

Post by spleenatis »



Hi everyone,

I have a 1979 GL1000. I juste changed the coils (old one didn't work anymore).

The new one have a 5 ohm primary resistance, the old 2. The ballast resistor is 3 ohm.

My question is : can I discard the ballast resistor, or should I keep it ?

Thank you for your help

Atis


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WingAdmin
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Re: New coils, without ballast resistor ?

Post by WingAdmin »

spleenatis wrote: Sun Oct 11, 2020 4:32 am Hi everyone,

I have a 1979 GL1000. I juste changed the coils (old one didn't work anymore).

The new one have a 5 ohm primary resistance, the old 2. The ballast resistor is 3 ohm.

My question is : can I discard the ballast resistor, or should I keep it ?

Thank you for your help

Atis
My inclination would be to discard the resistor. You'll know pretty quickly if you need it once you start it up.
spleenatis
Posts: 6
Joined: Sun Oct 11, 2020 4:29 am
Location: France
Motorcycle: 1979 GL1000

Re: New coils, without ballast resistor ?

Post by spleenatis »

Hello,

Thanks for your reply. I've tried with and without. No difference. But measuring the tension at the coil gave me the answer : without resistor it goes nearly to 13V, so to much. I've put it back !!

Thank you
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DenverWinger
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Re: New coils, without ballast resistor ?

Post by DenverWinger »

My comment would be this:

If you have a reliable spark WITH the ballast resistor in line then keep it. Running with the ballast resistor bypassed would result in additional current thru the points, which can lead to faster pitting on the contacts of an increasingly hard to find contact point set. Or if the original resistor is out-of-spec your voltage may be too low to the coils, in which case automotive ballast resistors for old ignition point-style Ford or Dodge vehicles will work. Chevy used a resistance wire in the wiring harness for their ballast, so impractical to use.

New GL1000 ignition capacitors (also hard to find) instead of 40+ yr old ones which degrade with time can also improve spark and reduce contact point pitting. As a substitute for Honda capacitors, you can probably adapt a capacitor from one of those point sets sold for the old classic V8 automotive engines. Think those are still commonly available. Or find a points and capacitor set for a Lawnmower engine. Should still be able to get a Ford or Dodge ballast resistor, too.

The connections probably won't plug-and-play like an OEM capacitor, but it's really pretty simple. Need two capacitors for the 1000 'Wing ignition. The cases of the capacitors go to ground somewhere and the lead or center terminal of the substitute capacitors connect to the each of the lines going to the 'Wing's two contact point sets.
♫ 99 Little Bugs in the Code, ♪
♪ 99 Bugs in the Code. ♫ :(
♫ Take one down, Patch it around, ♪
♫ 127 Little Bugs in the Code. ♫ ♪ :shock:

~Mark
spleenatis
Posts: 6
Joined: Sun Oct 11, 2020 4:29 am
Location: France
Motorcycle: 1979 GL1000

Re: New coils, without ballast resistor ?

Post by spleenatis »

Thank you for your complete answer !

I guess I'll really keep my resistor !


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