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No spark to either cylinder

Posted: Fri Oct 28, 2022 10:43 am
by twd46
Hello,

I went for a ride a few weeks ago and my 91 907 performed very well. The next day, I went out to start the bike and it wouldn't start. It hasn't started since. I eventually killed the starter trying to start it and have installed a new starter. But I am still not getting spark on either cylinder. The fuel pump cuts on as it should, and bike turns over well. Ive checked ecu connections and they look good. I am thinking crank position sensor or more likely, wiring. Its odd that it ran great one day, but wouldn't start the next. Any help would be most appreciated. I miss riding it.

Re: No spark to either cylinder

Posted: Fri Oct 28, 2022 9:10 pm
by Mc tool
Have a good look at the kill switch and wires . Not sure about the 907 but the 906 kill switch cuts the power to the ecu . Probly the quickest way would be just to check you have power to the ecu. If you dont, try bridging out the kill switch where it joins the main harness.

Re: No spark to either cylinder

Posted: Fri Oct 28, 2022 11:41 pm
by twd46
Thanks MC tool. I think thats a good place to start.