Well, my new Ignitor unit came and I installed it and my bike still has the same symptoms. That is, cylinders 1 and 4 are not getting any spark.
I sat down and had a longer look at the schematic and I can see some possible scenarios that might be consistant with the facts on hand. Those facts are: - I've measured the resistances of both my primary and secondary coils and my pulse generator coils and they all show continuity and resitances that are within spec. - I've tried two different Ignitor units (my original and the new one) and the system fails the same way with either (no spark on 1 & 4). Scenario # 1 is that the new ignitor unit is bad in the same way that the old one is, i.e. failing on the cylinder 1 & 4 side. I don't think much of this idea however - seems like too big a coincidence. Scenario #2: that even though the pulse generators both measure good on continuity and resistance, the one that sends the signal for 1 & 4 may, somehow, be out of place relative to the central shaft that spins with a magnet on it to generate the pulses. I'll be able to see this, I think, by cranking the bike and looking for voltage pulses coming up the cable from the pulse generators. If both sides have similar pulses, then I think this won't be the issue. If one pulse is low or mssing, then I'll open the pulse generator cover and see what's what in there. Scenario #3: one of the connectors linking the pulse generator cable to the Ignitor may be corroded and not passing signal. Frankly, this seems remote to me. The surfaces seem clean and I've plugged and unplugged them several times. Scenario #4: The wire that carries the 1 & 4 signal from the ignitor to the 1 & 4 coil may be open. I can run a simple continuity test to demo this. I know the ground wire and the 2 &3 wire from the ignitor to the coils has to be good as I've got spark on 2 & 3. Scenario #5: The wire on the coils that carries the ground from the 2 & 3 side to the 1 & 4 side may be open. Scenario #6: The connection where the 1 & 4 signal from the ignitor connects to the 1 & 4 coil may be corroded and not passing the signal. I've had this disconnected and reconnected and it seems unlikely to me like in #3. Dennis H., are you reading this? I'm looking at page 19-0 in my CB700SC manual and I'm wondering if I'm missing some other scenarios? Dennis - samadhi<soft|coda|muse>.com --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Nighthawk Motorcycle Lovers!" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/nighthawk_lovers?hl=en -~----------~----~----~----~------~----~------~--~---
