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I just finished the coil relay mod and put on new bars. Pics inside

  • Thread starter Thread starter andrewclaycomb
  • Start date Start date
A

andrewclaycomb

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Well after a long day of working with solder and backing out a stripped out screw in the right controls, I finally finished the coil relay mod that everybody keeps talking about. I didn't have any problems with my ignition since switching to the Dyna S with Dyna 3 ohm coils, but I figured having a strong connection can't hurt. I also switched out my slightly bent bars for Daytona bars and put on some smaller grips.

Updated with photos below.
 
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I would suggest turning the relay so that the legs face down. Upwards water stays in the connector and tends to evaporate slowly and may speed up corrosion of the connectors.
Did you notice any improvement!
 
i gotta question too, is that a honda reg rec in there? i have a 78 750 with the seperate reg and reg, i know there is a thread here somewhere on the wiring in of the honda unit, can you point me in the right direction? how do you like the relay? if i get my thread situation fixed, this is next....

clean pics, btw

greg
 
Everything in that pic is newish. New flasher relay from about a year ago. The reg/rec is actually an electrex one (I think) because the old one was over charging my battery. The starter solenoid is a $10 lawn tractor solenoid that works as opposed to the last 2 GS solenoids I've had and paid a lot more for. And the actual coil relay is a bosch 5 pin with the 5 pin harness. I'm going to start putting together the rest of the photos now.
 
All of the pictures

All of the pictures

We all like pictures so here they are.

Gas tank off, grips cut off almost ready for new bars.
cr1.jpg

cr2.jpg


Here's the relay monted off the same bolt that holds on the left side of the starter solenoid. I had to move the flasher relay over a little to make this work out. But it's perfect for wiring.
cr3.jpg


And here's the harness wired and ready for the positive connection to the battery, which I wired to the positive post of the starter solenoid and the white ground connection. I grounded directly to the battery for now.
cr4.jpg

I left the fifth wire bundled to do the headlight kill mod in the future
 
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cr5.jpg


Here is the original Y connection powering the coils which is about to get snipped.
cr6.jpg

to make way for this new connection. The red wire is the Dyna power wire.
cr9.jpg

coil wired and back in place
cr10.jpg
 
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Here's the relay trigger wire coming directly off the original power wire from the coils. The harness has been so molested in it's past. Yes you do see at least 3 generations of shrink wrap.
cr11.jpg


and before prettying up the wiring.
cr8.jpg

during
cr12.jpg

after
cr13.jpg
 
Excellent! The pictures give a very nice overview. Remember to swing that relay down so that water does not collect in the base and corrode the contacts.
I like your workshop, so clean and tidy!
 
I'm still looking for a way to swing it down. I've run out of real estate in there.
The "shop" is so tidy only because my car normally sits in that stall. The bike is forced off to the side when parked.


EDIT: alright I moved the relay under the seat and zip tied it to the frame bar behind the battery. Now it's hangin downward so I shouldn't have a corrosion problem.
 
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She's running great. I went on a 300 mile trip shortly after doing this and everything ran fine. Seems to idle a little smoother, but that could be all in my head.

I wasn't expecting anything huge because I have a Dyna S ignition, Dyna green 3 ohm coils and new plug wires/caps. I just wanted something more reliable that would take some stress off the stock wiring harness. The most beneficial part for the bike running I'm sure was cutting off old bullet/butt connectors and soldering in as much fresh wire as I could.
 
No problem, I added a relay for my dual air horns but I didn't photograph it and wish I had. Here the horns are after completion.

DSCF0005.jpg

DSCF0003.jpg

DSCF0002.jpg

DSCF0001.jpg
 
The turn signals? the front are as far as I know stock and the rear and just black plastic stalks I found that I thought look stockish. I think they were like $20 at a local bike shop.
 
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