Before you condemn the CDI, check the coils. Remove the tank, pull the 2 primary wires from the left coil and switch them with the 2 on the right one. Also take the plug wire from the left and switch with the right. If the no fire condition switches to the right, you have a bad left hand coil. If the problem stays on the left, the CDI is probably the culprit.
From what I have heard about CDI units, the OEM appears to be better. The Procom units seem to have a bit of a problem when starting the bikes. Maybe someone who owns one can pipe up.
One question I forgot to ask, by "Not Firing" have you confirmed that there is no spark at the plug by pulling it, then resting it on the head while cranking to check for spark? Do it to both plugs.
