No spark on 2&3

Posted by adamisalive on
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/No-spark-on-2-3-tp4061743.html

Howdy all,


I have a 1981 CB750C that I got for cheap.
Been working my way through all of its troubles, and there are a lot...
One that is stumping me is that i get no spark from cylinders 2&3.
I checked the coils and they are fine as I get a spark when I swap the blue and yellow wires on the coils. The blue wire side works fine. I have continuity all the way down the yellow wire and the spark units are also working. I traced the problem back to the ignition pulse assembly.
I am going to check the timing today but I am not getting any spark at any time so it cant be the timing me thinks...  I have been reading that these pulser assemblies don't usually fail so I was wondering wether to replace it or not.

Any help would be great!