No spark replaced cdi and pulse generator pulse generator air gap .025 no spark with green/yellow wire going to coil

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: No spark

Check the side stand kill switch if your bike has one. It kills the engine so that you don’t start out with the side stand down. If broken or out of adjustment, it would kill the spark. Check for a broken wire at the side stand switch and coupler. Try moving the kill switch by hand. If that doesn’t work then wire a jumper around the switch to bypass it. Check the fuses. How good is the battery? Try a jump start from your car battery. Is the handlebar kill switch on? Check the operation of the ignition switch and all kill switches with a volt ohmmeter. Install new spark plug.

If that doesn't do it, check the wiring harness. Did a wire come unplugged? Are all wires clean and with solid connections? Any abraded or pinched wires? Is the bike in neutral and the neutral light is lit up? If no neutral light, check the neutral switch and neutral switch wire on center casing. If still no spark, get CDI system and coils checked at the dealers shop. You can screw up a CDI unit checking it yourself.

SOURCE: cbx 750 1984 4 pin plug going to cdi unit

go to your local honda dealer or a good library and look up the exact make and model of your bike and get the plug wiring code for the cdi,most bikes i know aere different from each other in the cdi wiring,if you get it wrong the first time,you will fry the cdi and they are quite expensive to replace..hope this helps

SOURCE: Hi,I've a 98 Fireblade and can't get a spark

Hi and welcome to FixYa,

To my understanding, there are only 2 wires from the ignition pulse generator:

• yellow - pulsating 0.5 VAC when cranking; and
  
• white/yellow - ground.
  

• IGN +12 on the black/white wires of the ignition coils;
  
• IGN +12  on the 3 wires of the engine stop relay other than the red/orange;
  
• 0 volts on the red/orange (red/white) wire from the BAS (bank angle sensor).
  

SOURCE: no spark on spark plug

To check the ignition coil, unplug the wires going to it and check the resistance with an ohm meter. There are two parts of it to check, the primary and secondary circuits. The primary circuit is the low voltage side where the black and green wires from the harness attach. The resistance through this part of the coil should be between 0.16 and 0.19 ohms. Check the secondary side by measuring the resistance between the spark plug lead and the primary side where the green wire was attached. The resistance there should be between 3.69 and 4.51 ohms.
The resistance through the pulse generator, as measured between the two wires that come from it, should be between 468 and 572 ohms.
Generally, the various components of the ignition system are very trouble free. If you're not getting spark to the spark plug, be sure to check all of the bike's wire harness and connectors for corrosion, melted connectors, broken wires, etc.