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Author Topic: Coils powered direct from battery?  (Read 1829 times)

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Offline KB02

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Coils powered direct from battery?
« on: April 17, 2006, 05:50:47 PM »
I have started work on another project bike; a 1980 Kawasaki KZ550c that a buddy of mine has given me. I found the website www.kzrider.com to almost as helpful as this site has been (what did[/b] we do before the internet).

Anyway, I found an article posted on their website about powering the coils directly from the battery (through a relay) for far improved spark and performance. I was wondering if anyone has done with a CB? He has instructions for both points and electric (yes, even Dyna) ignition systems.
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Offline TwoTired

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Re: Coils powered direct from battery?
« Reply #1 on: April 17, 2006, 06:29:09 PM »
The closer the voltage is to battery potential at the coils, the better the spark will be.
The relay idea seems to be a bypass of all the old corroded connections in the bike's wiring, connectors and switches in path between the battery and the coils.  In that sense, it is effective improvement to the ultimate spark voltage.  However, it still leaves the rest of the bike's wiring, connectors, and switches still corroded and wasting power from the battery and the alternator.  Why not just repair the existing bike's electrical issues to restore factory voltage at the ignition coils?

Cheers,
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Offline cben750f0

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Re: Coils powered direct from battery?
« Reply #2 on: April 17, 2006, 09:29:42 PM »
http://www.sohc4.us/forums/index.php?topic=313.0

 this is what i have done on my F1... the relay powers the coiuls directly form the battery hope this helps...peace

PS there is a pic of the mod on this page of the FAQ http://www.sohc4.us/forums/index.php?topic=5752.0
« Last Edit: April 17, 2006, 09:50:42 PM by cben750f1 »
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Offline KB02

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Re: Coils powered direct from battery?
« Reply #3 on: April 18, 2006, 05:11:04 AM »
Quote from: cben750f1 on April 17, 2006, 09:29:42 PM
PS there is a pic of the mod on this page of the FAQ http://www.sohc4.us/forums/index.php?topic=5752.0

Yup, that is the same thing they had listed. I was just wondering if anyone had done such a thing to these old Hondas. I guess they have. And from the sounds of thngs, it works!

I probably won't do it to one of my bikes right off untill I get a little more proficiant in the electrics dept... That Kawi is sure testing me right now, though, I'll tell you what...
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1978 CB750K Project
2000 Ducati ST2
...and a pedal bike

Join the AMA today!!

My project thread Part I: K8 Project "Parts Bike"
My project thread Part II: Finishing (yeah, right) touches on Project "Parts Bike"

eldar

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Re: Coils powered direct from battery?
« Reply #4 on: April 18, 2006, 08:21:31 AM »
Stronger spark is always nice. I might do the relay myself but I would still clean all the old contacts. Why waste ANY power.
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Offline cben750f0

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Re: Coils powered direct from battery?
« Reply #5 on: April 18, 2006, 11:52:51 PM »
my major prob was a dicky kill switch, so i just use it to switch the relay now.... was getting a drop across the switch, and no matter what i did to the switch it didnt get any better.... the spark is bloody good now though!!!!..peace
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you are never to old, to act like a kid... be safe
funny thing,chasing someone down hill on a bike 30 years older than theirs..
he said \\\\\\\'it was like watching a 250kg unguided weapon getting stuck up you bum\\\\\\\ http://www.bikepics.com/members/trixtrem/
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