225DX help-clueless now

[Tri-Z dude]

my 84 DX has a bad problem- here goes
i start it up(1st pull) runs good let it warm up trailprotrailpro i leave about 5-10 minutes of riding, it backfires really bad and then dies and it wont start back up
i think it migh be a coil inside on the stator getting hot and makin it die dont know
i replaced ignition coil, cdi box, rectifier, ignition switch
ive even switched wiring harness itself
i havent replace stator or kill switch
ive cleaned carb
im clueless now man
someone please reply trailprotrailpro ride on sunday
Ben

[Tri-Z dude]

bump

[Howdy]

When it died did it have spark?
Does it have spark now?
Will it start back up after sitting a while?

How does the plug look?

Howdy

[Tri-Z dude]

dont know if it had spark when it dies it would start back up about 10% of the time
i can go out right now a start it 1st pull
i can let it sit for about an hour and it will start up 1st pull
and it has a brand new spark plug in it
Ben