QuestionHey Bill, i have a 1986 CMX 450 Rebel. it has spark but its not consistent, i just got it sparking today, need help on getting it to spark everytime the piston is at its highest point. Anything i can do to fix it for cheap? Thanks, its a good bke that i wanna keep, any help Greatly Appriciated.
AnswerKyle, CDI ignitions are usually pass-fail, but I do know of one on a 250 Rebel that had a lot of misfiring to it, which turned out to be defective spark plug caps. Check them with an ohm meter... should be 5k ohms, disconnected from the wire.
IF you can follow this outline (taken from an online source), it should help you get reliable spark...
Honda CB450T ignition test information: from the cdimagician on Ebay
The measurement of the Yellow and Green wire coming from the coil may not have a reading.
The coil primary winding may have opened up. This is an infinite resistance, meaning a bad ignition coil.
The measurement of the Pink and Green wires going to the stator may not have a reading.
The coil in the stator may also open up. Resistance of the wires could be less than 135 ohms.
The coil could have shorted windings. Not enough energy will be developed in the stator coil for the ignition.
The measurement of the resistance of the White and Blue wires may not have a reading. This coil on the stator may open up. Resistance of the wires could be less than 85 Ohms. Shorted windings in the stator coil will keep it from developing enough energy for the ignition.
The measurement of the resistance of the Brown and Light Blue wires may not have a reading. The coil on the stator may open up. Resistance of the wires could be less than 207 Ohms.
The black wire with the white stripe goes to the kill switch and key on the handle bar…...
If the kill switch is on or the ignition switch is Off the black/white wire will be connected to the frame of the motorcycle.
0.0 Ohms resistance to the frame.
The motorcycle will not start up, ….or will shut down.
If the kill switch is off and the ignition is on there will be no connection to the frame.
The black/white wire resistance to the frame will be infinite or no reading on the meter.
With no connection to the frame, the bike will start up,…. or will be running
Pulse generator test 50-170 ohms Blue/yellow to Green wires
Alternator charging coil measure between all three yellow wires .6 to 1.1 ohms between leads
Ignition coil primary windings .1 to .3 ohms Rebel 450
Ignition coil secondary windings 7,200 to 8,800 ohms Rebel 450
Bill Silver
