Hi everyone, I have 91 warrior with 45'000 miles , My brake all of a sudden felt half way spongy after I had it for emission test in Jeffy loop. .I bled the rear tires and it felt good and solid but after a few days it becomes half spongy again. I plan to replace the master cylinder(85$) this weekend. I appreciate if anybody has a similar experience to share . Air gets into the rear brakes somehow..