Engine Won't Shut Off
 

I am stumped!
My '95 Magnum 425 just won't shut off, either with the key or the kill switch. It started out as an intermittent thing, but now it's constant. I have replaced the CDI, rev limiter, battery, and key switch. I have checked and cleaned all the grounds and connectors. The only way I can get the engine to stop is to choke it or pull the coil wire.
Any advice or ideas are greatly appreciated.

Engine Won't Shut Off
 

did you ohm test the 2 switches to see if there closing the circuit?

Engine Won't Shut Off
 

Yes, I replaced the key switch from a known working one, then did a bench test to verify it was operating properly. I also traced the kill switch and tested it for correct operation, and it is.
A bit of additional information: It has about half of the power and speed as it did before. This symptom used to only be present when I would have the problem with getting the engine to turn off, but now it is also constant. So what would cause a loss of power AND inoperable kill switch at the same time?