The New And Improved Unofficial R65 Forum V2

Technical Discussion => BMW Technical Q&A, Primarily R65 => Topic started by: Redbaron on July 21, 2025, 04:17:57 PM

Title: Next problem-NO SPARK!
Post by: Redbaron on July 21, 2025, 04:17:57 PM

I thought I was finished but, after finding no power on red wire at ignition switch, I ran a new red wire direct from battery to ignition. All lights work and bike cranks over but it does not have a spark at spark plugs. I rechecked all the electrics and especially the relays, wires, connectors. What would you do next?

Title: Re: Next problem-NO SPARK!
Post by: Barry on July 22, 2025, 01:52:47 AM

First step would be to check that +12volts is getting to the ignition coils. With the ignition on there should be +12V at terminal 15 of the rear coil.   If not there is a fault somewhere between the ignition switch - stop switch and the coil.

Title: Re: Next problem-NO SPARK!
Post by: Redbaron on July 22, 2025, 08:58:30 AM

I checked ground/earth wires from coils and one was bad.  I now have spark! Thanks