I have a like new 97 yamaha banshee and its not getting spark i just put a new coil and cdi box on it and nothing happend i was riding it and it just stoped running it has great compression and new top end and new bottom end and nothing happend i looked @ all the wires and they all are hooked up and i just put new spark plugs coil cdi box and new coil boots i need help nothing is happening @ all its not getting any spark or its not fireing please help
SOURCE: 1987 Honda shadow vt1100c no spark at any plug
The voltage on the coils is present except at the instant of firing. The interruption of the voltage is what causes the coil to fire. The cdi box is what causes the voltage interruption.
The interruption is very hard to detect. You are not the first to be stymied by that box. If you have access to an oscilloscope, I think you can see the pulse if it occurs.
SOURCE: I have a 1985 xv700 virago. one of my plugs are
follow the plug wire back to the coil and see if there are any breaks, if not might switch coil with the other one and see if the other plug now misfires, if so replace the coil, most cdi problems are not intermittent, typically they either work, or they dont.
SOURCE: 1996 zx11 getting sprk to one bank only
Hi and welcome to FixYa,
The voltage on the green wire must be pulsating when cranking/starting the bike, not steady. Confirm by similarly testing the voltage on the black wire on the left ignition coil. If the green still reads a constant voltage, then the CDI is faulty; to be more specific, most likely that the switching tansistor inside the CDI that drives the right ignition coil has shorted.
Good luck and thank you for asking FixYa.
SOURCE: My 2003 yamaha blaster won't fire, it fires once
YES IF YOUR KEY SWITCH IS NOT HOOKED UP CORRECTLY THE BIKE WILL NOT FIRE.....
SOURCE: 1983 yamaha xj 650 no spark already changed the
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