Same lack of power problem new topic
 

Now that I know that my Cam sprockets are stock I still keep digging, someone on FB group mentioned stick coils, but they are new, why not check again.... No fire on left side, swap left right, still no fire ON THE LEFT! Also left plug looks like it never sparked: electrode is brand new, no erosion, no heat, so I assume dealer saw no spark, replaced coil and called it a day....

Now I got to find why left side is dead, assume bad wire, but I need to find a diagram for this bike, 2004 twin spark

Matt, How does the bike run if you disconnect both lower plugs?

This diagram will get you close: https://www.mac-pac.org/wp-content/uploads/2014/09/R1150RT-2-Plug-Elec-Diagram-V1_3.pdf but fuse numbers will be different.

I have full schematics if there’s something else you’d like to know.

Awesome, thanks!

this confirms my fear that each coils is triggered by ECU directly, they all have common power and separate grounds, so if I have connectivity from coil to ECU pin I will be needing new motronic unit :(

ive not seen a bad motronic I might have a spare

Mystery Solved! (I hope) not sure how I missed it, seems it's barely held together by some plastic... bet whoever did the plugs last time broke it...

Bought used Motronic because one came up cheap ($100) so now I will have a spare

Now a million dollar question: where do I get a coil plug?
http://forums.pelicanparts.com/uploa...1543038004.jpg

should be a spare on the harness repair page of the bmw parts diagram
get the contacts as well
it looks fubar

fubar for sure, electrical contacts snapped clean off, all 3... lot's of headache and 1000's of miles with slow bike. Wish I had known, kept telling myself "BMW is not race bike..." and even tried selling it because it was so slow, but always hoped there is an easy fix, wish I had known....

Can that plug be ordered without any wires ?
I just want to buy the plug.

I think what you're looking for is #9 on this page.

https://www.ascycles.com/bmw/1999/R1100S/Engine%20electrical%20system/Ignition%20system,%20double-ignition.html#PartsTable

I broke one of those connections many years ago. From what I remember, it's a simple fix. If my memory is correct, the plug comes pre-wired with a short length of wire to be soldered to the existing control wire. Cut the old on off, solder the new one on.

Mike

Looks like I can get a universal plug from BMW for $25 or so, fits coils and other things

83 30 0 402 341 REPAIR PLUG, 3-PIN - NO. 610616

if you cant find one let me know
I might have one out of a donor harness

Always worth checking here https://www.beemerboneyard.com/

got everything from MAX BMW, wire repair kit, spark plugs, air filter, valve cover gaskets and o-rings, working on assembly. Replaced brake lines while the tank was off, might get it finished in couple days, not much work left, just need to find time

Will test and report back once it's done, of course today is last reasonably warm day in the extended forecast, dropping from mid-50's in to 30's, luckily thins bike really shines in cold weather!

Finished assembly and went for a quick ride, HOLY ****!! IT HAS BALLS!!! Even lofted front wheel few times. No more chugging, shaking, stalling, I'm in love with it again!!

Was you able to find out any info on this plug ?

Is it the wrong plug for the coil .

The coil plug is fragile. It would be nice to replace the plug, and not having to buy
the " wire repair kit" .

It is a plug with some wire length coming out (3 wires) and 4 crimp connectors, also 4 very heavy heat shrink tubes, I'm guessing extra in case you screw up.

It was maybe $23? wrong color, but who cares, bike is running like raped ape!

Rode it again this weekend to a brunch 40 miles away... was so excited to use the bike that I went out in a pouring rain and then spent the rest of the day on it, went to work then couple parties, came home late night in freezing temps, in love it it all over again, can't believe I was ready to sell it