Periodic Maintenance Procedures
To avoid serious injury, never place your fingers or
palm in front of the piston. If you apply compressed
air into the caliper, the piston may crush your hand
Pull out the pistons by hand.
Remove the dust seals [A] and fluid seals [B].
Remove the bleed valve [C] and rubber cap [D].
If compressed air is not available, do as follows for both
calipers coincidentally, with the brake hose connected
to the caliper.
Prepare a container for brake fluid, and perform the
work above it.
Remove the pad spring and pads (see Front Brake Pad
Removal in the Brakes chapter).
Pump the brake lever until the pistons come out of the
cylinders, and then disassemble the caliper.
Front Caliper Assembly
Clean the caliper parts except for the pads.
For cleaning the parts, use only disc brake fluid,
isopropyl alcohol, or ethyl alcohol.
Install the bleed valve and rubber cap.
Torque - Bleed Valves: 7.8 N·m (0.80 kgf·m, 69 in·lb)
Apply brake fluid to the cylinder bore.
Replace the fluid seals [A] with new ones.
Apply silicone grease to the fluid seals, and install them
into the cylinders by hand.
Replace the dust seals [B] with new ones if they are dam-
Apply brake fluid to the outside of the pistons, and push
them into each cylinder by hand.
Check the dust cover [A] and the friction boot [B] replace
them with new ones if they are damaged.
Apply a thin coat of PBC (Poly Butyl Cuprysil) grease to
the caliper holder shaft [C] and pin bolt [D] (PBC is a spe-
cial high temperature, water-resistance grease).
Install the caliper holder.
Install the pads (see Front Brake Pad Installation in the
Wire up any spilled brake fluid on the caliper with wet
PERIODIC MAINTENANCE 2-65