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1Back to top Go down   coil wiring.... Empty coil wiring.... on Wed Aug 01, 2012 7:37 pm

twincarb

twincarb
Life time member
Life time member
when making the connections to the coils can someone confirm which pins take which colour wires on the coils.... prob the best way would be

I know the colours of the wires that connect to the coils just want to get them the right way around so once my fuel pump arrives (hopefully in the morning) I can crank her over and she has the best chance of firing..

left hand
Front - Brown
Middle -
Rear -

Right Hand
Front - Brown
Middle -
Rear -


__________________________________________________
BMW K100LT 1988 Matt Black Peugeot Electra Blue (ELX) Colour is now confirmed...
Yamaha Thundercat
Triumph Spitfire (not a bike but hell it's British chaps)
coil wiring.... 169042 coil wiring.... 169034
    

2Back to top Go down   coil wiring.... Empty Re: coil wiring.... on Wed Aug 01, 2012 8:09 pm

rosskko

rosskko
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VIP
coil wiring.... Sl370610


__________________________________________________
1986 K100RT VIN 0093801K100RT with summer fairing for a northern visitor

Basic/2 6308802K100CJ  05/1988

K1100RS 0194321
    

3Back to top Go down   coil wiring.... Empty Re: coil wiring.... on Thu Aug 02, 2012 5:24 pm

twincarb

twincarb
Life time member
Life time member
looking above which coil is for cylinder 1-4 and 2-3


__________________________________________________
BMW K100LT 1988 Matt Black Peugeot Electra Blue (ELX) Colour is now confirmed...
Yamaha Thundercat
Triumph Spitfire (not a bike but hell it's British chaps)
coil wiring.... 169042 coil wiring.... 169034
    

4Back to top Go down   coil wiring.... Empty Re: coil wiring.... on Thu Aug 02, 2012 6:11 pm

Inge K.

Inge K.
VIP
VIP
The blue wire is the signal to coil 1-4.
The red wire is the signal to coil 2-3.


__________________________________________________
Inge K.
K100RS -86. (first owner), K1100LTSE -94.
    

5Back to top Go down   coil wiring.... Empty Re: coil wiring.... on Thu Aug 02, 2012 6:23 pm

twincarb

twincarb
Life time member
Life time member
thanks Inge K and rossco


__________________________________________________
BMW K100LT 1988 Matt Black Peugeot Electra Blue (ELX) Colour is now confirmed...
Yamaha Thundercat
Triumph Spitfire (not a bike but hell it's British chaps)
coil wiring.... 169042 coil wiring.... 169034
    

6Back to top Go down   coil wiring.... Empty Re: coil wiring.... on Thu Aug 02, 2012 6:46 pm

pathfinderK100RS

pathfinderK100RS
active member
active member
This thread is very informative to me, as I have just started having performance problems with my 89 K100RS. Shocked Runs erratic and loses power as it warms up. I pulled all four plugs and the two outside plugs were very dark, indicating loss of fire and loading up, while the two center plugs were a nice grey color. By reading this thread about wiring, am I correct in assuming that cylinders 1 and 4 are fed off the same coil and 2 and 3 off the other?

I replaced the dark plugs and it made no difference. I suspected a coil because it runs best initially and tries to wind up and seems to run on all four, but as it warms up loses power and you can tell a couple of cylinders are down.

Is the location of the coils fairly easy to access? Question

Thanks for the help! I love the bike that has just turned 58,000 miles and still feels very nice. coil wiring.... 447221
coil wiring.... 89BMWR100White
pathfinderK100RS



Last edited by pathfinderK100RS on Sun Aug 05, 2012 12:07 pm; edited 1 time in total

    

7Back to top Go down   coil wiring.... Empty Re: coil wiring.... on Thu Aug 02, 2012 7:09 pm

twincarb

twincarb
Life time member
Life time member
hi pathfinder,

I see your new to the forum, pop into the Members Introduction page and start a thread there to say Hi to the forum, you will start to get hellos from all over.

Cylinders 1 + 4 fire from the left coil and 2 + 3 from the right hand coil, there locations are based on sitting on the bike, the left hand side, just to the right of the throttle bodies, there is probably a plastic shield around them which is held on by 4 bolts/screws

It wasn't until I cleaned my coils that I could read the sticker on them which indicates what cylinders they fired on! I am sure there are a couple of threads on here with similar problems, may well be worth doing a quick search.

If you also drop back to the Portal you will find a link to the electrical diagrams which Crazy Frog has created to break them down really well


__________________________________________________
BMW K100LT 1988 Matt Black Peugeot Electra Blue (ELX) Colour is now confirmed...
Yamaha Thundercat
Triumph Spitfire (not a bike but hell it's British chaps)
coil wiring.... 169042 coil wiring.... 169034
    

8Back to top Go down   coil wiring.... Empty Re: coil wiring.... on Thu Aug 02, 2012 7:19 pm

Inge K.

Inge K.
VIP
VIP
Welcome Pathfinder!

I would have started with checking the ground to the coils (brown wire)....that the terminals and connectors is clean.

You could also try to run a additional ground wire.

Then the terminals and connectors at the positive feed (green/yellow wire), and that enough voltage reaches the coils.


__________________________________________________
Inge K.
K100RS -86. (first owner), K1100LTSE -94.
    

9Back to top Go down   coil wiring.... Empty Re: coil wiring.... on Thu Aug 02, 2012 10:04 pm

pathfinderK100RS

pathfinderK100RS
active member
active member
Thanks guys! I'm overwhelmed at the quality of responses to my post! cheers Really is a confidence boost to a hunch I had about the coils to begin with. I have had this bike for four years and this is the first hiccup I have experienced with anything, and at 58,000 miles most bikes would be on the scrap heap!

Really appreciate the advice as most of my recreational wrenching is done on snowmobiles, coil wiring.... 815479305 of which I have about 40 vintage that I restore and still race.

pathfinderK100RS

    

10Back to top Go down   coil wiring.... Empty Re: coil wiring.... on Wed Aug 15, 2012 5:17 pm

pathfinderK100RS

pathfinderK100RS
active member
active member
@Inge K. wrote:Welcome Pathfinder!

I would have started with checking the ground to the coils (brown wire)....that the terminals and connectors is clean.

You could also try to run a additional ground wire.

Then the terminals and connectors at the positive feed (green/yellow wire), and that enough voltage reaches the coils.

I took your advice and cleaned up the ground wires to both coils, put in two new plugs in 1 and 4 and took a cruise! Initially it was totally cured, but after about ten or fifteen minutes it started breaking up at high revs. sounds like a combination of factors, of which the grounds were only a part. Going to bite the bullet and try a new coil, any advice on where to pick one up? Thanks for all the advice, it's not cured, but it sure is getting better! cheers

pathfinderK100RS

    

11Back to top Go down   coil wiring.... Empty Re: coil wiring.... on Wed Aug 15, 2012 5:21 pm

twincarb

twincarb
Life time member
Life time member
have a search on the forum for Hall Sensors. they are known for breaking down when they get hot.... far far cheaper as well than getting a coil pack.

I think that if you look in the substitute area you will find there is an alternative to the BMW one.


__________________________________________________
BMW K100LT 1988 Matt Black Peugeot Electra Blue (ELX) Colour is now confirmed...
Yamaha Thundercat
Triumph Spitfire (not a bike but hell it's British chaps)
coil wiring.... 169042 coil wiring.... 169034
    

12Back to top Go down   coil wiring.... Empty Re: coil wiring.... on Wed Aug 15, 2012 9:57 pm

RicK G

RicK G
VIP
VIP
@pathfinderK100RS wrote:
@Inge K. wrote:Welcome Pathfinder!

I would have started with checking the ground to the coils (brown wire)....that the terminals and connectors is clean.

You could also try to run a additional ground wire.

Then the terminals and connectors at the positive feed (green/yellow wire), and that enough voltage reaches the coils.

I took your advice and cleaned up the ground wires to both coils, put in two new plugs in 1 and 4 and took a cruise! Initially it was totally cured, but after about ten or fifteen minutes it started breaking up at high revs. sounds like a combination of factors, of which the grounds were only a part. Going to bite the bullet and try a new coil, any advice on where to pick one up? Thanks for all the advice, it's not cured, but it sure is getting better! cheers

Have a look here http://www.euromotoelectrics.com/BMW-K-Parts-s/60.htm?searching=Y&sort=13&cat=60&show=20&page=1&search=%20coil

pathfinderK100RS


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 1993 K1100 LT, 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 for now
    

13Back to top Go down   coil wiring.... Empty Re: coil wiring.... on Wed Aug 15, 2012 11:09 pm

pathfinderK100RS

pathfinderK100RS
active member
active member
Thanks Rick! Looks like a great site! coil wiring.... 723598

path coil wiring.... 447221 finderK100RS

    

14Back to top Go down   coil wiring.... Empty Re: coil wiring.... on Thu May 16, 2013 2:03 pm

Erman

Erman
Gold member
Gold member
Time to liven up this thread as I'm connecting the coils... :p
Does brown go to the spades marked ''-'' , and green/yellow on the spades marked "+"?
That would make the center terminal on each coil the signal terminal, correct?


__________________________________________________
Bikes:

1984 BMW K1000RS

1984 Yamaha XJ750 Seca
    

15Back to top Go down   coil wiring.... Empty Re: coil wiring.... on Thu May 16, 2013 3:30 pm

Inge K.

Inge K.
VIP
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Green/yellow wire, power feed (+).
Blue/black wire, signal coil 1/4 [front] (-).
Red/black wire, signal coil 2/3 [rear] (-).
Brown wire, ground (center).


__________________________________________________
Inge K.
K100RS -86. (first owner), K1100LTSE -94.
    

16Back to top Go down   coil wiring.... Empty Re: coil wiring.... on Thu May 16, 2013 11:13 pm

Erman

Erman
Gold member
Gold member
Thanks again, Inge! Very Happy


__________________________________________________
Bikes:

1984 BMW K1000RS

1984 Yamaha XJ750 Seca
    

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