Have you ever tried running it with the firmware 101224_STOCK?
I guess not...
I ran it with the latest firmware that was there in July 2011... I think it was the 211, then.
I didn't try the 224, I admit.
Anyway, this combo is out of the question for me for now, since I run Greek RCGT TC with required Nosram elec's as I said, and the RC Bike Worlds Stock class rules for 2012 and '13 state we all should use the SP Club Sport Spec (something like that, I dont have it handy, but it's "blinky", no-turbo ESC) and SP MMM 13.5T motor ONLY.
In the Pre Warm Up race we were allowed to use whatever 13.5T and ESC we had, but in the next Warmup in May, and the Worlds in August we will use the SP combo.
So, actually the combination of X12+HW Xerun will not be used by me...
The Pure Evo (X12) is back in the car, it gave me a 2nd place in class in yesterday's race!