ok. l have a 1998 ktm 300 mxc. l will be out riding my bike for the first time in a couple of weeks and when l use my brakes alot, they will go out. ive tried bleeding them and they still dont work. but then, they will go back to normal after about 10 min. once l ride it for about a week, they wont go out. so please help.

ride it more often

Try bleeding them again. Also have a look at the pads to see that you do not have oil on them. A fork seal may be leaking onto a disc which would explain why it is intermittent as it dries up after a while.