Coil Relay Mod - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 16 (permalink) Old 08-25-2006, 12:40 PM Thread Starter
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Coil Relay Mod

Just curious if anyone has tried this coil relay mod on a Vulcan?


Obviously, our bikes only have a red, not a red/yellow as the KZ's have.
I did it on both my KZ's and it made a strong difference, especially on the 80 with all the crappy wiring. Wonder how it would impact hot starting issues?
It basically takes a new heavy gauge wire from the battery straight to the coil power (through the relay) and uses the old coil power to trigger the relay.

I don't see why it wouldn't work on the Vulcan. I'm thinking I might give it a go while I'm working on my r/r relocation this weekend...

Fergy
Kyle, TX VN750.com member #707 VROC#19556
2002 VN1500 Classic
Spline Lube Procedure, with photos, R/R Relocation and Coil Mod
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Last edited by fergy; 08-25-2006 at 12:44 PM.
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post #2 of 16 (permalink) Old 08-25-2006, 03:30 PM
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Quote:
Originally Posted by fergy
Just curious if anyone has tried this coil relay mod on a Vulcan?


Obviously, our bikes only have a red, not a red/yellow as the KZ's have.
I did it on both my KZ's and it made a strong difference, especially on the 80 with all the crappy wiring. Wonder how it would impact hot starting issues?
It basically takes a new heavy gauge wire from the battery straight to the coil power (through the relay) and uses the old coil power to trigger the relay.

I don't see why it wouldn't work on the Vulcan. I'm thinking I might give it a go while I'm working on my r/r relocation this weekend...
My GS1100e and 650KZ are both set up that way,a little more juice from the coils never hurts. At least on a four cylinder classic .On twins I don't know.
Rob
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post #3 of 16 (permalink) Old 08-25-2006, 03:37 PM Thread Starter
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It just seems to me like you'd be going "the long way" to get to the same place by buying an MF battery to get better voltage to your coils. I still believe in the MF batteries, if for no other reason that the MF part, but I can't see that this could hurt anything, unless we have a computer on the bike that I don't know about.

Fergy
Kyle, TX VN750.com member #707 VROC#19556
2002 VN1500 Classic
Spline Lube Procedure, with photos, R/R Relocation and Coil Mod
Rusty Tank Cleaning!
Electrical Fault Finding Flowchart
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post #4 of 16 (permalink) Old 08-26-2006, 02:22 AM
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i thought the ingition contol module did that. doesnt it adjust the timing for throttle and loads?

'04 Vn750
Currently Installed
nat'l cycle deflector shield
westco 12v30 MF, 30A/h w/ 350 CCA's w/ custom box
TOC stator cover w/ Frankenstator mod!
R/R relo

Soon to have (own or on order)
TOC ACCT's
Mez's 110-FRT 170/80-Rear
Custom rear fender and tail light
Givi hard bags w/ custom rear turn signals


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post #5 of 16 (permalink) Old 08-26-2006, 04:11 AM
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Yeah, how does that work? If the relay stays on all the time, then it's cool, but if the relay only kicks in with a fire signal, that's a no-go.

2000 A16
Drilled baffles
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relocated R/R
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post #6 of 16 (permalink) Old 08-26-2006, 04:55 AM
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Hi!
It's connected to KILL switch, not to STARTER switch.
So the relay is still supplyied till you turn off the engine
with the KILL switch. It's very simple.
Thanks for the idea, FERGY ! I have had problems with
the ignition switch, and i hae to make such circuit.
Now i have simple connection from 30A fuse to kill switch
only for proper work. But i can turn the engine on without
the key ... With this circuit it will be the same, but i will
have much current for ignition coils, as it was said by RUCRUISEN

Regards!

Kanclerz
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Warsaw, Poland, Europe
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post #7 of 16 (permalink) Old 08-27-2006, 12:09 AM
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There was nothing wrong with my stock battery, but I got a MF battery anyway. I can tell you that starting is much improved.

Ron from Jersey
2005 VN750
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post #8 of 16 (permalink) Old 08-28-2006, 12:52 PM Thread Starter
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OK guys, I did the coil mod. Did it along with my R/R Relocation this weekend and it works like a champ. If it weren't such a pain to remove my seat, I would have done them seperate so I could test the effectiveness against hard starting when hot. But, I didn't, so all I can say is that it works. Might have been my imagination, but seemed like I had a little more power going uphill. I let it get plenty hot after about a 15 mile ride, shut it off, sat for a couple minutes and fired it back up and it hit on the first sound of the starter. So, I guess time will tell. I changed the link in my sig to go to my Vulcan page with links to all the mods.

Side note, I drilled out the bolts from the top of the battery box, which took me about 10 minutes total time, including changing bits after my pilot hole and using my magnet on a stick to pick up all the shavings...

Fergy
Kyle, TX VN750.com member #707 VROC#19556
2002 VN1500 Classic
Spline Lube Procedure, with photos, R/R Relocation and Coil Mod
Rusty Tank Cleaning!
Electrical Fault Finding Flowchart
SEAFOAM JUNKIE!



Last edited by fergy; 08-28-2006 at 03:11 PM.
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post #9 of 16 (permalink) Old 08-28-2006, 05:49 PM
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You didn't! Did you at least plug the holes? If you don't, you take a chance of losing all your electrons.

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relocated R/R
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post #10 of 16 (permalink) Old 08-28-2006, 06:09 PM Thread Starter
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Nope, didn't plug the holes. If I plugged them holes, the electrons would find some other hole to go up, hopefully not the one sitting on the seat at the time.

Fergy
Kyle, TX VN750.com member #707 VROC#19556
2002 VN1500 Classic
Spline Lube Procedure, with photos, R/R Relocation and Coil Mod
Rusty Tank Cleaning!
Electrical Fault Finding Flowchart
SEAFOAM JUNKIE!


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