22-03-12, 11:20 AM
I had a similar problem: miles of pedal travel which I took to be one of the seals in the master cylinder failing rather than air in the system because the brake did feel firm once the lever had moved about 2".. not that spongy feeling air gives.
Bought a bunch of other stuff from my dealer at the same time so have only just noticed he stung me £48 for the Yamaha seal kit. :eek
Anyway, it did the trick in my case. Though I discovered I couldn't bleed all the air out of the master cylinder with it mounted on the bike... you need to be able to tip it from side to side and tap it to shift all the bubbles to the top. Loosen the banjo on the top of the cylinder to let them escape rather than trying to pump them down to the caliper.
Bought a bunch of other stuff from my dealer at the same time so have only just noticed he stung me £48 for the Yamaha seal kit. :eek
Anyway, it did the trick in my case. Though I discovered I couldn't bleed all the air out of the master cylinder with it mounted on the bike... you need to be able to tip it from side to side and tap it to shift all the bubbles to the top. Loosen the banjo on the top of the cylinder to let them escape rather than trying to pump them down to the caliper.