Can the electrickery gurus please advise:

Would one be able to modify the stock K100 wiring loom to accept THESE COILS from BSK Speedworks with no probs? 

They use them on their K100 race bike with an alternative electronic fuel injection system and these coils plug directly into their bespoke wiring loom.

Only reason I ask is it seems a good price for brand new coils and RAM leads. For about the same price as 2nd hand orange stack coils and the RAM leads you can get this.

They only have 3 wires going in, instead of the 5 or so in the stock coils....

They are the K1200 coils and have the same output voltage and impedance as the K1100 coils but come as a single item.
The primary resistance is 1.2 ohms as against the near 3 ohms of the K100 coils.
You could probably use a 2.2ohm resistor in each primary feed but that will lower the output voltage by about half or a bit more which would be heaps enough to electrocute a rat but may cause problems with a K100.
Give me a while and I will check out some other things.
That didn't take long
http://accel-motorcycle.com/motorcylce-and-atv/ignition-coils/universal-super-coils-black.html

RicK G wrote:They are the K1200 coils and have the same output voltage and impedance as the K1100 coils but come as a single item.

The coils for the K1200 look a bit different..............



The coils from BSK is for a Ford Mondeo III 1.8, I would guess that the spec is different.

Ah Ha Ingapedia strikes again.  I remember that he runs an after market FI system and I would assume that the ignition is integral with it, so who but Ben knows and that may be a trade secret.

NOOO...!    do not use a resistor to load up the impedances of the primary coils ....it will just act as a huge current limit with unwanted side affects

would be better to use a higher resistance - impedance coil than to use a lower one and load it up with any resistor

just what make sense to me

RicK G wrote:Give me a while and I will check out some other things.
That didn't take long
http://accel-motorcycle.com/motorcylce-and-atv/ignition-coils/universal-super-coils-black.html

Has anyone documented fitting Accel universal coils to their K? My 1985 K100 has the original, solid black coils and one of them measures bad.

Reviving an old topic here. But came across this post and wanted to toss out my experience.

I have installed the ignition coil with RAM leads from BSK Speedworks on my 93 K1100LT project. It was actually a fairly straight forward process to modify the stock wiring coil connectors and easier on the wallet than the OEM coils. I did decide to tap one of the original mounting tubes/eyes on the intermediate housing that was used for the stock coils for the included bracket.  As far as I can tell it has been successfully integrated without ill side effects. I will say that I have not done a full road test (such as commuting to work) other than a few test runs around my neighborhood for various other adjustments and tweaks. I did some research on the type of coil pack that BSK sent and it looks to be similar to what they use in the Ford Fiesta. Overall, the bike starts right up and runs smooth.

If anyone has input about this modification, I'm definitely all ears.

I have a partial, rather long term experience (well over 100 000 km) in that respect. With RAM leads only. Original coils.

On my 1995 K1100LT I have replaced a while ago the original leads by new RAM ones because a local K1100RS owner informed that after having replaced his original leads by NGK ones, he observed having got rid of his engine well known tendency to heat much more than the K2vs. According to his researches, he had just gone back to what the BMW's ingeneers had featured for the k2v: 7 kOhm antiparasite between coil and spark plug electrode, splitted in 5kOhm on the spark plug cover (it is written on each of them) and 2 on the coil plug side.


For a strange reason, the BMW's engineers installed antiparasites resistive spark plugs on the K1100 whilst, probably for standardization purpose, keeping the 5kOhm spark plug covers. That implies a total of around 12 kOhm instead of 7 in the line between coil and spark plug electrode. That seems detrimental to the sparks quality.
For another strange reason with probably also a taste of standardization, the BMW dealers - at least here in France - now exclusively sell resistive spark plugs, even for K2v. And with those resistive spark plugs the K2v do not work as well.

The RAM leads have a total resistance of around 2.5 kOhm only. I never succeeded to get the information from the supplier. I had to measure it myself.

Using RAM leads instead of the original ones on K1100 permits to go back to around 7 kOhm, like on K2v. Better engine performance clearly felt by the k1100 owners having done it, witnessed in forum(s).
Using RAM leads instead of the original ones on K2v keeping the same non resistive spark plugs must imply wonderful sparks (at which parasites price?), hence their "improvement" as well.

My experience is based on K1100: very "living" engine, temperature needle in a more vertical position, reasonable fuel consumption, around 5 litres per 100 km at speeds slightly over the legal limits.

Unfortunately, no effect on the K1100 famous appetite for oil 

The easiest way I've found to run Resistor plugs in a bike that is designed for non-resistor spark plugs, is to just use 1K plug wires and the 5 K Resistor spark plug. I do this all the time on my R100RT with the dual plug coil. Never had an issue.

I have seen some stuff on 5k wires with 5k resistor plugs compared to just the 5 K wires and a non resistor plugs.  In most cases you will not notice any difference if the rest of your ignition system is in good shape.

The biggy in all this is to make sure the resistance in the coils are right. The electronic ignition is expecting/designed to work with a narrow range of resistance, outside of that it will likely fry itself. You can always put in Hotter coils and they will overcome any of the increase in resistance in the wires & plugs. That's what I did on my 95 R100RT, go to a hotter coil, for a better spark.