i just got it. turns over great no spark .no power to coil's any tips would be great .. i have gone over the wireing all the conectors are good i can work on cars this im lost ...

 

Does your CDI look like this?



If so, the next thing to check is whether you have kill switch problems or not. Unplug the CDI, set all kill switches to the "run" position, and turn on the ignition. Use a meter to measure the resistance of the kill switch pin on the CDI wiring harness plug to engine ground. You should read an open circuit (or infinite resistance). If you read a short circuit (zero ohms) to ground then we need to find your kill switch problem next.

If you don't have kill switch problems then the next step will be measuring the power to you CDI, and the trigger signal to your CDI.

 

ill try try that thank you

 

ok did that but the power and the kill wires are switched kill is on bottom power on top looking at the di above they are swaped could that be the problem

 

How do you know they are swapped? What color is the kill switch wire at the CDI? What color is the Ignition Power wire?

If they really are swapped then it certainly won't work.

Use a meter and measure whether you CDI is DC powered or AC powered:

1) Unplug the CDI.
2) Turn on the ignition switch.
3) Measure the DC voltage on the Ignition Power pin of the CDI connector to ground. If you see 12 volts with the ignition switch on, and 0 volts with the ignition switch off then You CDI is DC powered.
4) If you measure zero volts on the CDI power pin with ignition on and off, then switch you meter over to AC volts on the 200 volts AC scale. Measure the CDI Power pin AC voltage to ground while cranking the engine. You should see 50-80 volts AC. If you do then your CDI is AC powered.

You'll need to know if your CDI is AC powered or DC powered if you ever need to replace it. The two are not compatible, and they look identical, so you have to get the correct one.

Besides power the CDI needs a trigger signal to tell the CDI when to fire the spark plug. Set your meter to the lowest AC voltage scale you it has. While cranking the engine measure the AC voltage on the trigger pin of the CDI connector. It should read 0.2 to 0.5 volts AC. With the engine stopped, measure the resistance of the same pin to ground. You should measure 150 ohms or so.