Ever since I replaced my rear break rotor with a Moose aftermarket rotor,my rear breaks overheat and dont work if Im really using them hard,wich I do alot. This never happend before I made the change. I have lowered the break peddle as much as I dare and this has not helped. The rotor is not solid,just like the factory one. Also, Im still using the same break pads as Ive always used. Anyone got a clue what might be goin on? Thanks