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#998540 - 10/06/17 07:48 PM Re: Stickcoils-ectomy - Yes or No? [Re: roger 04 rt]  
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Originally Posted by roger 04 rt
I only have a second but this isn’t a great plan as the dwell time on the black green and black violet wires is very short only 1mS. The common coil dwell is about 3mS.

You’d be better off figuring where the 2nd Load Relay socket is.


Afternoon Roger

I know you are on a short time budget so I'm sure you didn't have time to read through the convoluted story above but Imgnr finally verified the wires to the stick coils are green not green/black so it looks like his bike didn't come with a 2nd load relief relay.


D.R. ___
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#998547 - 10/06/17 08:54 PM Re: Stickcoils-ectomy - Yes or No? [Re: Imgnr]  
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Originally Posted by Imgnr


- CCP: If I put a jumper in, what slots should I jump? What is the factory CCP that I should get?



Evening Imgnr

On the correct CCP?-- WELL!, this one seems to be problem. I have so little info on the Rockster.

My parts book shows a p/n 61132306213 adapter but my wiring schematic shows a Brown CCP terminals 30-86-87a-87 shorted together.

I show that p/n 61132306213 adapter costing about $3.80 from BMW so I guess I'm going to suggest that you just buy a new one (probably have to order it).

Does your bike have bare socket now or is there something pushed into some of the terminal cavities?


D.R. ___
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#998548 - 10/06/17 08:55 PM Re: Stickcoils-ectomy - Yes or No? [Re: Imgnr]  
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Evening DR, Didn’t notice that but saw pictures of a common coil. Is he thinking of using that? That’s where my dwell time concern lies.

#998549 - 10/06/17 08:59 PM Re: Stickcoils-ectomy - Yes or No? [Re: Imgnr]  
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Also, when I read out my 2003/04 Motronic here’s what I get for coding plugs.

2004 R1150RT US (USA) Twin Spark
No Coding Plug: R1150R/GS US+ECE
Beige Coding Plug: R1150R/GS Japan
Yellow Coding Plug: R1150R-GS Ocatan 91
Pink Coding Plug: R1150RT-RS US+ECE
30-86 Coding Plug: R1150RT/RS Japan
30-86-87: R1100S US+ECE
30-86-87a: No Valid String found
30-86-87-87a: keine Serie (no series)

So I would say no coding plug is the best/correct choice unless lower octane is desired, then a Yellow plug.

Last edited by roger 04 rt; 10/06/17 08:59 PM.
#998550 - 10/06/17 09:01 PM Re: Stickcoils-ectomy - Yes or No? [Re: roger 04 rt]  
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Originally Posted by roger 04 rt
Evening DR, Didn’t notice that but saw pictures of a common coil. Is he thinking of using that? That’s where my dwell time concern lies.


Evening Roger

Yes, he is talking of using a standard lower coil for the upper plugs (in addition to keeping the stock lower coil). He is planning (at least I think he is planning) to use one of the upper coil driver outputs to trigger that coil.

You have a valid concern with the dwell time difference.

I have my own concerns about using one-side stick coil driver to trigger that large coil.

So between us it doesn't sound like a sound idea.


D.R. ___
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#998552 - 10/06/17 09:40 PM Re: Stickcoils-ectomy - Yes or No? [Re: Imgnr]  
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Shout out to DR and Roger! I don't know there is such a big difference in dwell time between the standard coil and the coil sticks. Thought it was good enough to power the 2003 R1150's before the coil sticks were used.

Guess I'm going to add the second relay and use the coil sticks.

Thank you! I'm working on this tomorrow. Fingers crossed.

Last edited by Imgnr; 10/06/17 09:46 PM.

No sparkenzie BMW but learning...
#998561 - 10/06/17 11:09 PM Re: Stickcoils-ectomy - Yes or No? [Re: Imgnr]  
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Imgnr, all the green wires are connected in a common bundle. Do you have an opinion on why there is no 12V on the green wires at the coils?

Last edited by roger 04 rt; 10/06/17 11:11 PM.
#998566 - 10/07/17 01:35 AM Re: Stickcoils-ectomy - Yes or No? [Re: Imgnr]  
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Roger i have no idea why theres no power to the green wires. Ill try my best to trace it. There should be power with the engine running only but not just ignition on? I tested it with the engine running from the bottom plugs.

Also i checked the part number on the coil and theyre the main ones from an R1100. Would that make a difference w the dwell time? Dwell is not controlled by the montronic device?


No sparkenzie BMW but learning...
#998579 - 10/07/17 09:45 AM Re: Stickcoils-ectomy - Yes or No? [Re: Imgnr]  
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I think it’s a good idea to trace the green wires, you may avoid other problems in the future. All the green wires are in a bundle and they are all switched on with the key (engine doesn’t have to be running).

The dwell is controlled by the Motronic by fixed tables. The dwell time on the black/green and black/violet wires is about 1/3 to 1/2 that of the control wire going to the common coil for the lower plugs.

#998582 - 10/07/17 11:59 AM Re: Stickcoils-ectomy - Yes or No? [Re: Imgnr]  
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Morning Imgnr

You might get some idea on where to look for the lack of 12v to the upper coils.

The 12v that feeds those upper coils comes out of the ign switch, goes on for a ways then splits into (4) green wire circuits. (a basic solder joint)

One of those green wires goes to the kill switch, one to the main (lower) coil, then one green wire goes to EACH upper stick coil.

If BOTH stick coils don’t have 12v on the green wires then you know the problem is (probably) at or above where they splice together, if your kill switch works & lower coil has 12v power (ie engine runs) then you have good 12v to the splice joint. (so problem can’t be above the splice joint)

So IF both stick coils are lacking 12v power but the engine runs on the lower coil that pretty well points to the problem AT the (4 wire) solder joint or that BOTH L/H & R/H green wires to the stick coils are open (cut) very close to the solder joint before they head off in different directions.

The problem is, I can’t tell you where that solder joint is on the 1150 Rockster & unfortunately my wiring schematic doesn’t give wire run distances between harness ends & solder joints.


D.R. ___
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