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3 ohm coils or 5 ohm coils 1979 GS750?

  • Thread starter Thread starter Greg O.
  • Start date Start date
G

Greg O.

Guest
I want to replace the original coils on my 1979 GS 750L. It still has the points, and I may keep it that way for now, and change to a Dyna S ignition down the road. I found Accel Super coils with wires and boots for $132. However they are 3 ohm coils. Will 3 ohm coils work with points, or will it eat the points. If I use 5 ohm coils, will they work with the Dyna S ignition?

I did a search and read a lot of threads, but didn't really find an answer.

Thanks,

Greg
 
Your bike needs the 5 ohm coils now, but if you are switching to Dyna later, you will need 3 ohm coils.
Compromise...get the 3 ohm coils and a couple of 2 ohm ballast resistors. When you get the Dyna, ditch the resistors.

.
 
THanks Steve, the ballast resistors crossed my mind.

Besides having to keep the points in good working order, is there a big advantage to using Dyna S ignition, such as hotter spark?

Greg
 
Instructions for the Dyna S says it's designed to work with 5 ohm coils, but 3 ohm will work fine as well. The stock coils are actually rated at 4.5 ohms (at least on my '79 550 that is). 3 ohm coils with ballist is a fine way to go, just trying to provide information.:)
 
Steve said:
Your bike needs the 5 ohm coils now, but if you are switching to Dyna later, you will need 3 ohm coils.
Compromise...get the 3 ohm coils and a couple of 2 ohm ballast resistors. When you get the Dyna, ditch the resistors.

.
Click to expand...

Hi Steve. How do you hook up the ballist resistors.
Regards Don
 
Has anyone mounted the Accel coils on a 750L? I was wondering about fitment and room.

Greg
 
Greg O. said:
Splice the resister into the hot side of the coil.
Click to expand...

Yep. I think stock coils have a pos and neg. Dyna do not, can be reversed and doesn't matter. Hot from kill switch (orange and white probably) to resistor, then on to coil. Someone better than me with electrics chime in, but you'd probably want to check your voltage loss to coils before you put the extra resistance in there. Maybe do the coil relay mod while you're at it.
 
Greg O. said:
Has anyone mounted the Accel coils on a 750L? I was wondering about fitment and room.

Greg
Click to expand...

When I got my bike, it had accel coils. It fit fine on my 750E.

The coils got replaced when I installed my Dyna S to Dyna 3 ohm coils.
 
Greg O. said:
Has anyone mounted the Accel coils on a 750L? I was wondering about fitment and room.

Greg
Click to expand...
Can't speak for fit on a 750, but my wife's 850L and my son's 850 both came with Accel coils. No problems with room or fit.

.
 
Last edited:
Thanks everyone,

I am going to order these coils from Accel. Great price including wires, if you don't mind yellow. A friend of mine put them on his Yamaha, and I think they look great, but beauty is in the eye of the beholder. Here is the link if anyone is interested in new coils. $132.95 plus S&H $13.95, a little high for S&H.

http://www.mawonline.com/newsite/accel-coil_kits.htm

Greg
 
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