ive had this issue,,,i adjusted my rear brake aferter i bought it cuz i had alot of play,,it seemed fine beore i rode it again and then about a half hour of riding my brakes siezed up solid
me and my buddy have a 525 and every race so far he has raced his rear brakes have been sticking, and the race i raced my were stuck after the race also. have any of you guys had this problem yet??? i am still trying to figure out why. he also had his front brakes go out a couple of times too. let me know if you guys have experienced this issue.