Topic: '83 CB650sc w/no spark now....

[pikeymick]

So while I was waiting for my jets to come in I decided to clean up the electrical connections. The jets came in today and no I have no spark... I had spark before I fiddled with it. I'm wondering if I didn't inadvertently cross up the connections to the coil, I thought the ground was on the bottom on both sides...

What would be the end result if I did cross wire the coil? I couldn't find any blown fuses, and didn't hear any pop... what else could it be? I checked all the other connections and they seem solid. All plug wires are connected, and the one test plug is grounded...

[w1sa]

Killswitch?.........Battery?...........Electrical flow to/from the coils?
Have you got a multi-meter?

[pikeymick]

The bike runs just only on cylinders 1&2 (pipes hot to the touch the others only warm), new battery, flipped the coils yesterday morning so they are running opposite now...and still only 1&2 (coils are 1&3, 2&4 (modded to run 2&4, 1&3 to test them)). Need to get a multimeter tomorrow. Any specific brand to get?

[w1sa]

Hmmm!. Given my understanding of what you're describing, both coils seem to be functioning.
Is it possible that you separated or loosened the lead/plug cap connection on any of the ignition leads? The only thing that seems common is the placement of the #3 and #4 leads (assumimg you've left them in their original position).......if so,  you could swap or substitute them to see if the condition changes..........

[scunny]

coils are 1&4 2&3

[pikeymick]

Ah crap I wrote 650 in the title, but its a 550.... doesn't that matter for the cil order?

[cb650]

coils are 1&4 2&3
[/quote
Might be mute as its a 550 but a 83 should be a dual cam and they might have changed the igy around.  I wonder how much would be the same.