What does the voltage regulator do on a ATV?
Would the voltage regulator cause the ATV to not spark?

ALSO:
What is the voltage susposed to be from the CDI to the coil? My sportsman 500 isn't getting any power to the ignition coil.

Thanks in advance.

 

Regulator changes ac volts from the stator to dc volts for the battery and other electronics. If you have a no spark condition,first check the resistance on the pick up coil white and white/red wires leading to the cdi. Should show around 97 ohms. If this is with in range,could be a main stator problem. For that need to know the year model you have.

 

The stator is fine. We are beleiving that it may be the CDI box. 2007 Sportsman 500.

 

Have you isolated the kill circuit from the cdi? If you haven't already, pull the black wire from the cdi and see if you have spark. Plus cdis are getting cheap for these now if you determine that's the problem.http://www.ebay.com/itm/CDI-MODULE-F...=mtr#vi-ilComp

 

The bike was running fine. But I started it with the battery connected to the machine, then removed one terminal, then the bike started to lose power and die and I quickly reattached the wire to the battery, and then it completely died, then it started back up again. So then I finished what I was doing, then I reinstalled everything I was doing (rear diff bracket had to be welded so I removed the rear fender and went to test it without the battery connected) then once everything was reinstalled, went to start the bike, all it will do is crank and crank but no spark to the ignition coil. And there is no power getting to the ignition coil either.

 

When the kill switch is activated, then engine will not crank. With the kill switch unactivated it'll crank without a spark.

 

I'm not talking about the kill switch on the left control. Disconnect the black wire from the cdi to isolate the kill system from it and see it if runs. If it still doesn't have spark,you may have shorted out the cdi or something else may have happened when you disconnected the battery while it was running. This is where the service manual comes in handy for trouble shooting and electrical checks. For 5 bucks you can't beat it.http://polaris-atv.brssm.com/2007-Po...ce-Manual.html

 

What else could of happened?

 

Good question.. When you disconnect the battery and quickly reconnect it on a running machine, you can cause a spike in voltage that can short out cdis,regulators,melt wires in the wiring harness,etc. On older models you could possibly get away with that without damage as the ignition was magneto triggered,but on your 2007 model it's a dci system and dependent on battery voltage at all times for ignition. That's why rather than chasing your tail,throwing parts at it,best to get that cheap manual and go through the trouble shooting steps along with the specific electrical checks it shows. This way you an narrow down what may have happened.

 

Is the voltage regulator required for ignition? Like if I have a blown Voltage Regulator would it cause no spark? And would disconnect and reconnecting the battery cause the stator to go as well?