AAHHHHH! I found a solution to the leaking or fly out filler cap on Hayes 9. (besides buying new brakes)
Screws from my xm radio fit the hole perfect, have tight threads so they dont cut the rubber and won't pop out upon huge braking.
Screws from my xm radio fit the hole perfect, have tight threads so they dont cut the rubber and won't pop out upon huge braking.