Man from Nam - those look like the old compound E07
and the tyre ran too hot
How do you keep it cold?
I dunno about Man from Nam's bike tyre, but mine looked a lot worse and that was from running on tar for 700km, tyre inflated to 3bar, speed between 120-140km/h with a pillion and loaded for a 4 week holiday in tempratures around the 30, stopping every 100km or so for a smoke break.
If a tyre can't handle that, it is a kak tyre.
Overloaded
When we together next time we can debate this. It has been done to death already on this forum. Please look at the sidewall on all tyres and note the load and speed indexes (they are basically the same on all tyres).
http://www.blackcircles.com/general/speedrating
it is on all tyres including car tyres. The link above explains
Saying a tyre is KAK because we push it past its boundaries is just not cricket.
I am assuming you where overloaded by your description, we dont know as nothing was weighed, but its easy to overload a tyre causing too much flex even at 3 bar and that causes overheating.
Thanks TJ, would like to hear your explanation on this.

For interest sake, I see here below that GRIM says the rating is 325kg. That is where my problem is. The bike already weighs in at say 250, plus me pusses the load to 350, that without pillion and luggage.

There I am over the rating.

If this is the case they are selling me a tyre that's not up for the task. In any case, who the fuck rides a 250kg monster that weight only 75kg.
I specifically asked the question on this forum hoping to get a straight answer. If I can recall correctly it was said that the total load of the front and rear must be taken into consideration to determine the load. If that is the case, I was not overloaded.
I agree with you on this topic, "
Saying a tyre is KAK because we push it past its boundaries is just not cricket", but if I load and ride it within it's limits, and it still cracks up, it is a kak tyre, in my opinion in any case.

As Jakkals says and as I mentioned, its a great tyre, but it's cracking me up man.