Dual Reservoir Master Cylinder
The back reservoir in the mc, is for the front brakes.
The front reservoir is for the back brakes.
The reservoir for the front brakes is larger because the front brakes wear quicker, using more fluid.
You may have a drum brake master cylinder pictured. If both reservoirs are the same size, it is for drum brakes. Either way, the back reservoir is for the fronts and the front reservoir is for the backs.
The back reservoir in the mc, is for the front brakes.
The front reservoir is for the back brakes.
The reservoir for the front brakes is larger because the front brakes wear quicker, using more fluid.
You may have a drum brake master cylinder pictured. If both reservoirs are the same size, it is for drum brakes. Either way, the back reservoir is for the fronts and the front reservoir is for the backs.
