Join Date: Nov 2009
Location: Warwickshire UK
Rear Brake fluid
Rear brake fluid. Pedal getting low ?
There are concerns about the fluid in the reservoir getting hot and some owners have moved the reservoir away from the rear of the engine crank case.
Whilst it isn't a good thing for the fluid to become hot in the reservoir I doubt if it is the primary cause of the pedal getting low.
The reservoir acts as a header for the system and as the pads wear the level in the reservoir will become a little lower.
I don't believe that during the course of a ride out that the brake fluid in the reservoir " mixes" into the brake fluid in the master cylinder as there is no return line as such.
Therefore when during a ride out if my pedal should get low then this is most likely due to heating of the fluid in the MASTER cylinder which sits close to the exhaust pipes. The Master cylinder is not completely shielded from the heat down there and I believe this is the principle area that requires attention and not the reservoir.
I'm interested in other's opinions on this too : )