How did you know it wasn't bled properly the first time? You got overheating like that?
So, it proves that it's serious - that it has to be done like that, and it reminded me that joe sometimes pointed out that the cooling system was critical on these bikes.
TBird, the NGK KR8DI is a special for KTM. (I came across it in an NGK listing I got somewhere.) It's an Iridium plug, that's why the much higher price.
DCPR is M12 thread, 16mm hex, Projected insulator, Resistor.
K is M12 thread, 16mm hex, 19mm reach, Resistor, Iridium electrode.
KA is M12 thread, 14mm hex (you won't need a thin-wall socket), 26.5mm reach, A design series, Iridium electrode, -9 is 0.9mm gap instead of the standard 0.8
PS: Maybe they're KTM offroad bike guys, like my dealer here. If he never worked on a SD before, he'd think that the cooling system just the same as the offroad bikes. Who'd bother to check the manual to find out how to change the coolant?
PPS: I hope they're near to you, it's not good for it to get so hot.