No spark to ignition coil

Im not getting any spark to my ignition coil on my 2008 hi-bird atv. Ive replaced the cdi box and the coil and still nothing. Ive even disconnected the kill switch and no luck there either. Can someone please help im ready to blow this thing up it a chinese piece of crap.

Thanks
scott  

Does your CDI look like this:



If so, unplug the CDI and measure the resistance from the kill switch connection to engine ground.  Measure the wiring, not the CDI.  It should read open (infinite resistance).  It should not read shorted (zero ohms) to ground.  This method is much better for checking kill switch problems since it measures all the kill switches and the kill switch wiring simultaneously.

Measure the voltage on the AC ignition power connection to engine ground(leave CDI disconnected) while cranking.  You should see about 80 volts AC coming from the stator.  

Measure the Ignition Trigger Pulse voltage to engine ground while cranking.  You should see a low AC voltage of around 0.3 volts AC.  The actual voltage you get depends on your meter design but you should see something.

The last two tests check out the two stator ignition windings and the wiring to the CDI from the stator.

While you have the CDI unplugged, use the ohmmeter to verify that the ground wire (or wires) to the CDI are hooked up to engine ground.  And verify that the ignition coil connection makes it to the ignition coil.

Lynn Edwards  

where would the engine ground be located ive pulled the kill switch wire out of the cdi plug and still no spark  

Engine ground is the "engine".  It is made out of metal and therfore conducts electricity.  The negative post of the battery is connected to the engine and frame of the quad.  

Voltage is always measured between two points. Most commonly voltage is measured referenced to the negative battery terminal (which is the same as engine ground because they are tied together).  It is a lot more convenient to just probe the engine rather than the negative battery terminal.

You can use any bare metal surface of the engine or frame for your ground reference.  Paint is not conductive so you need to find bare aluminum or a bolt head etc.