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Dinli diamond back head scratcher


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I posted earlier looking for a wiring diagram, but maybe someone can help me with the problem if they’ve had it before. 
 

The quad Will start and idle ok, when I open the throttle it will rev all the way up until WOT and then it dies back down to idle, and if I keep the throttle wide open it will rev back up. It will do this over and over and over. 
 

I replaced the carb, (twice), Rectifier, battery, and spark plug.  The Stator ohmed out to the proper specs from dinli.  The other issue i can see is I’m not getting 12v on the choke circuit. The lights don’t work either. 
 

possible bad key switch? Maybe the new rectifier is bad? All the contacts on the key switch also ohm out properly    

comprsssion is up to 125 psi and spark is there. 
 

Reed valves look great.....

 

im at a loss. Any trouble shooting advice would be appreciated. 

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