Master Cylinder Inspection (Visual Inspection)
Remove the master cylinders (see Front/Rear Master
Disassemble the front and rear master cylinders (see
Master Cylinder Rubber Parts Replacement in the Peri-
odic Maintenance chapter).
Do not remove the secondary cup from the piston
since removal will damage it.
Check that there are no scratches, rust or pitting on the
inner wall [A] of each master cylinder and on the outside
of each piston [B].
If a master cylinder or piston shows any damage, replace
Inspect the primary cup [C] and secondary cup [D].
If a cup is worn, damaged softened (rotted), or swollen,
the piston assembly should be replaced to renew the
If fluid leakage is noted at the brake lever, the piston as-
sembly should be replaced to renew the cups.
Check the dust covers [E] for damage.
If they are damaged, replace them.
Check the piston return springs [F] for any damage.
If the springs are damaged, replace them.
Check that relief port [G] and supply port [H] are not
If the relief port becomes plugged, the brake pads will
drag on the disc. Blow the ports clean with compressed
Front Master Cylinder [J]
Rear Master Cylinder [K]