05 Kfx 50 Getting Hot / Stalling

[jplltz50]

GOT A KFX 50 2 STROKE. THE FOLLOWING MODS WERE DONE, 65 MAIN/REMOVED PRE PILOT PILOT JETTING, SHAVED HEAD .040, COOLER PLUG, INJECTOR REMOVED, HI FLOW AIR FILTER, BUT EXHAUST IS STOCK. THE MOTOR SEEMS WAY HOT TO THE TOUCH AFTER A LITTLE RIDING, IT STALLS BUT STARTS RIGHT UP. THE PLUG LOOKS CHOCOLATE BROWN ON ONE SIDE AND WHITE ON THE OTHER. I HAVE TRIED A SUPER COOL PLUG BUT NO CHANGE.... COULD THE STOCK EXHAUST BE CAUSING EXCESSIVE HEAT IN THE MOTOR.


ANY SUGGESTIONS IM OUT OF IDEAS.... THIS ALL STARTED AFTER THE MODS DONE

[LT80]

I got an idea......whack that caps button!!!!!

questions:
What was the stock jet size and why you needed to change?
What plug is stock and what plugs have you tried?
What octane fuel are you running?