Got my wheels back form Powdercoat, installed new tires, balanced them, went to reinstall rotors and that's when I noticed hairline cracks on the rear rotor, few bigger ones too. All I can say is WOW! never seen one cracked that bad.
When I got the bike rear master cylinder was stuck and after riding short distance rear caliper would begin to drag and almost lock up, I suspect last owner tried to limp it home or something, must have got that rotor red hot!