The brakes were working perfect, parked the bike for a few months. Then when I was going over the bike to get ready for the indoor track I noticed there was no rear pedal height at all. So I bled the line out and got all kinds of air out. It did come back to proper height and worked perfect all night. Now after sitting another month, its back to no pedal height. Its not leaking oil anywhere. What is going on here? How do I fix it? Thanks.