COIL selection

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gdonlo04
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COIL selection

Post #1 by gdonlo04 » Mon Feb 11, 2019 12:39 pm

I looked at the guru corner, typed in the search engine did not see this topic. i am looking for new coils for the 1978 gl 1000. i see 2 options 3 and 5 ohms. how do i know the correct one to purchase? looked at the Randak page no luck yet.

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Pony Ruiz
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Re: COIL selection

Post #2 by Pony Ruiz » Mon Feb 11, 2019 12:48 pm

I've had two 78's with the 3 ohm dyna green coils.

one with resistor - points
one without resistor - dyna
1980 GL 1100 - parting out - soon to be gone gone.
1978GL1000 goin naked now - 39k
2014 cb1100

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CYBORG
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Re: COIL selection

Post #3 by CYBORG » Mon Feb 11, 2019 1:09 pm

on my78 I have used 1200 coils. Dyna coils and ign. Both O.K. Now I run the C5 system, which comes with special coils, and it performs better then eather of the others. Had this bike since it was 1 year old, and now runs the best it has ever run
1978 custom GL1000
1977 custom with 1200 engine
1985 gl1200

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tlbranth
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Re: COIL selection

Post #4 by tlbranth » Mon Feb 11, 2019 2:40 pm

If you stick with the ballast resistor setup you need 3 ohm coils. If you put a jumper across the ballast you can use 5 ohm. If you buy Dynatech coils, you could probably go 5 ohm and eliminate the resistor. They're much better coils than the original OEMs and should need no boost at start.
Strictly my opinion though.
Terry
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1999 GL1500 SE
2002 Honda VT750 "ACE"
1975 GL1000
1970 CB750

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Sidecar Bob
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Re: COIL selection

Post #5 by Sidecar Bob » Mon Feb 11, 2019 3:13 pm

I switched to GL1500 coils a couple of years ago and they work just fine without ballast resistors. You can see what I did here viewtopic.php?f=1&t=60509&p=732354&hilit=1500+coils#p732354
My bike is an '83 (at the time it had a 1000 engine, now it has an 1100 but still with the same Dyna S and 1500 coils) so I used the 1100 coil brackets, which means it is slightly different from what you would need to do on a 1000 but at least one of the threads about similar conversions that I linked in that one have pics of how to do it in a 1000.
Mr. Honda ('83 GL1100/Dnepr) summer New Engine Thread
The Famous Eccles ('84 CX650EI/VeloUral) winter Never Ending Build (CX500forum)
Click: Colour schematics for all GL1000 & GL1100 and GL1200 standard models plus instructions on how to download the full size version
"A guy with two sidecars can't be all bad." - Cookie
Another guy with two sidecars..... Hmmmm... must be something to that....

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ericheath
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Re: COIL selection

Post #6 by ericheath » Tue Feb 12, 2019 1:39 am

Whatever I suggest here should be given ample time for a moderator to delicately correct. I apologize in advance.
77 WING, 1200 engine with 77 heads, cams, gl1100 foot pegs, Magna V65 front end, 764A carbs, [-gone Suzuki M109 monoshock--, replaced with gl1100 shocks] gl 1200 swing arm, gl1500 final drive, wheel and rear brakes Valkyrie seat, Meanstreak tank, Sportster pipes, Power Arc ignition off crank.
77 Wing. black
83 Wing, in pieces
"Continuing education is important even if the subject matter is fairly useless (as in this case)."---Greg Foresi

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Sidecar Bob
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Re: COIL selection

Post #7 by Sidecar Bob » Tue Feb 12, 2019 12:21 pm

Good info but he's talking about resistance in the high tension side for noise suppression not the resistance of the primary (low voltage) side of the coil and the need for a ballast resistor.
Mr. Honda ('83 GL1100/Dnepr) summer New Engine Thread
The Famous Eccles ('84 CX650EI/VeloUral) winter Never Ending Build (CX500forum)
Click: Colour schematics for all GL1000 & GL1100 and GL1200 standard models plus instructions on how to download the full size version
"A guy with two sidecars can't be all bad." - Cookie
Another guy with two sidecars..... Hmmmm... must be something to that....


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