CDI circuit board question
Thread Starter
Junior Member
Squid
Joined: Feb 2017
Posts: 20
CDI circuit board question
Hi I am new to the superhawk forum I have a issue with one of my ignition coils not firing does the CDI have a separate circuit for each ignition coil any and all info will be greatly appreciated.
VTR virgin
Superstock
Joined: Mar 2015
Posts: 447
From: Auckland, New Zealand
Certainly looks like two signal wires going from the ECM to the converter unit.
Step one is normally to swap the coils over and see if the fault follows the change, or stays the same. It is not unknown to have a break in one of the low tension cables leading to a coil, and an end-to-end resistance check from the converter plug to the coil terminal would assist in diagnosing that.
Thread Starter
Junior Member
Squid
Joined: Feb 2017
Posts: 20
I tested the ignition coil and it is working fine
Certainly looks like two signal wires going from the ECM to the converter unit.
Step one is normally to swap the coils over and see if the fault follows the change, or stays the same. It is not unknown to have a break in one of the low tension cables leading to a coil, and an end-to-end resistance check from the converter plug to the coil terminal would assist in diagnosing that.
Member
Squid
Joined: Nov 2013
Posts: 38
I had a problem with the coil firing . Wound up being a bad ground from the rectifier. If you find grounds are good I have both CDI boxes, rectifier, and coils up for sale.
hopefully you can track it to a ground problem before you spend a bunch replacing parts. If you resort to replacing see my thread with those parts forsale
hopefully you can track it to a ground problem before you spend a bunch replacing parts. If you resort to replacing see my thread with those parts forsale
Thread Starter
Junior Member
Squid
Joined: Feb 2017
Posts: 20
I had a problem with the coil firing . Wound up being a bad ground from the rectifier. If you find grounds are good I have both CDI boxes, rectifier, and coils up for sale.
hopefully you can track it to a ground problem before you spend a bunch replacing parts. If you resort to replacing see my thread with those parts forsale
hopefully you can track it to a ground problem before you spend a bunch replacing parts. If you resort to replacing see my thread with those parts forsale
Junior Member
Squid
Joined: Jun 2025
Posts: 10
Also I don't know the specs on the coils and do these bikes have a immobilizer or a resistor in the switch for security? Do these bikes have one or two pulse generators I only saw two wires coming out of the clutch case that may be them I'm not sure but the run to the front of the bike which idk what there connected to in the front
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