My 85 started cutting out at a medium-high rpm, I drove it to the house and it struggled to idle and died and wont kick back over.
I just got the 250r a couple months ago, and has been working fine, with some idle and lighting issues that I have been trying to fix.
Compression is around 145-150, no visual leaks, running 40:1 mix
The plug appears to be getting fuel, it is wet, and looks like it is running rich.
I pull the plug and ground it to the block to check the spark, and I am not getting much of a spark, sometimes no spark. No bright blue spark like the manual states.

I am thinking the coil needs replaced. I have had a ohm meter to it and the numbers dont match what the books says it should be at (I will edit with the exact numbers when i'm not at work). I had to replace the connector, and worked fine for awhile.

Is there anyway to check the stator without breaking seals and replacing gaskets?

So far I have removed the light. It was not worth the trouble.
The stock kill switch/high and low beam switch was removed for a push button kill switch prior to me buying it. The kill switch seems to ohm/ground out when pressed.

I think I may have figured it out. I removed the wiring for the head and tail light since they were not functional anyway, repaired the rigged up wiring, and removed the lighting module. It seems to be working fine now. No more cut out at mid to high RPM.