Ok, ok, i know i've revived a 2-year old thread, but i wanted to update my results on the MT-66 i ran on my Custom since i'm just about to replace it.
I was really satisfied with the overall performance of the tire, although i was suprised to see that i got the same mileage with it (14,000 mi) that i did with the stock Dunlop.
I believe the reason for that is the areas that i drove in. With the Dunlop, i drove around in Minnesota, with the MT-66 the majority of miles was in the Arizona desert. I think (just guessing) that the extreme heat of the summer will cause the tire to become overly soft and wear quicker.
Tire wear was consistent and there was no pitting or balance problems. I should state here that i used the balancing beads.
Handling was good throughout all climate riding changes. As i said before, i'm no sport-bike rider, but i will scrape metal occasionally in the turns. Straight-line was fine and cracks or road-snakes were not particularly troublesome. In my case, any problems were probably due more to my rear tire.
So there you go... overall i'd give it 4 stars out of 5. Highly recommended as a durable, good handling, and inexpensive tire.
My next tire is a Pirelli also, but this time i'm checking out the Night Dragons.