Front Brake building pressure - please help
Posted February 02, 2009 - 01:34 PM
What is causing this problem?:? The brake lever is not pushing the cylinder, I already checked that. Its actually a AVS lever that can return all the other way around. I am wondering whether the oil fluid perphas was no good. I had it changed just before the problem occurred, but done in a very professional shop. Anyone that has an idea what happened?
Posted February 02, 2009 - 01:50 PM
On my WR I did have a problem with one of the shoe brackets getting between the caliper and the shoe causing it to drag constantly.
I would pull the caliper off, douse it in brake cleaner, look for unusual wear (should be easy to spot on a bike that's been out 4 times) and look at the pads to see if they aren't seating on the rotor correctly and dragging on one part. Looking down from the top you should see daylight between the pads and rotor until you apply the brakes and it should be parallel (same distance across them). When cold the front wheel lifted should spin freely.
Posted February 02, 2009 - 01:52 PM
Posted February 03, 2009 - 10:50 AM
My .02 worth; the return hole in the master cylinder is stopped up.
This happened to one of my old TZ roadracers one time. I'd get two laps in before the back brake would slow the bike to a standstill. The return hole was blocked.
Not sure about these newer Yamahas, but the only wire I could find that was small enough to clear the hole on the older bikes was a single strand from a wire brush.