Hello i'm a new member from the United States currently in the process of restoring and modifying a k100rs. That recently has no spark tested from all 4 plugs.

I've spent years restoring and modifying this bike and had it running decent all last season. When it came time to put the bike away, I'm able to roll it from my garage into my spare bedroom with my other bikes to keep them warm lol. Changed oil, coolant, new battery, spark plugs. (I'm only mentioning this because i want members to understand this thing was stored proper so there wouldn't be any issues come spring.)

I began to rewire the entire chassis and injection harness using a motogadget mo.unit blue. Rewired and cleaned all chassis,gearbox,engine, and battery grounds with thicker cable which I've tested with a multimeter. Next i installed the mo.unit and began wiring the ignition with help from a proven diagram which i'll paste below.

http://forum.kforum-tech.com/members-upload/uploads/Updated-BMW-K100-M-Unit-Wiring-Diagram-by-Mikey-From-Piha.pdf

While i have the valve shims out and oil drained i have the starter outside the bike properly grounded and with ignition on I'm able to power and turn the starter motor. I've taken the plugs out one at a time and grounded them to the engine and while the starter engages alas no spark...

Maybe there is an issue with my wiring but I've been testing and triple checking the diagram i should be receiving spark. Is there anything else i should test that might have gone bad since storing like the Hall effect sensor? I have already replaced the ICU and it hasn't worked.

Wired the ignition into my new m unit and with the starter engaged i am getting no spark to all 4 plugs. Has anyone run into this issue when installing their m unit on an earlier K100rs 8 valve?

I'll post the proven diagram I've been following below. 

http://forum.kforum-tech.com/members-upload/uploads/Updated-BMW-K100-M-Unit-Wiring-Diagram-by-Mikey-From-Piha.pdf

This seems like a strange and hazardous way to determine ignition output. Maybe I'm under the effects of frigid weather coupled with heavy gravity here.

What is the story with the neutral light or the clutch lever switch?

Topics merged into appropriate forum section.

Thought i would revisit this thread after solving the issue. My wiring was correct as i didn’t change anything except fully install the starter now the plugs receive spark. Makes sense the motor would have to be turning along with the starter in order for the icu to send a timing signal to the plugs.