Ive been told at last service (about 1100 miles ago) that my front disc on my 05 XTX is warping. I can feel it certainly at lowish speeds as you can feel it pulsing when light to medium breaking. Ive done just short of 12000miles. Bit dissapointed that it needs replacing so "soon" but meh. Id rather be able to stop when neccesary than save a few quid and live dangerously.